Finding the Fourth Proportional to 1,016,783,128.05, 1,525,763,110.91 and 426,520,503.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,016,783,128.05 : 1,525,763,110.91 = 426,520,503.60 : x
2. Step 2: Convert to fraction form
   1,016,783,128.05/1,525,763,110.91 = 426,520,503.60/x
3. Step 3: Cross multiply
   1,016,783,128.05x = 1,525,763,110.91 × 426,520,503.60
4. Step 4: Simplify right side
   1,016,783,128.05x = 650,769,250,441,523,328
5. Step 5: Solve for x
   x = 650,769,250,441,523,328/1,016,783,128.05
6. Step 6: Final answer
   x = 640,027,585.52