Finding the Fourth Proportional to 552,586,978.50, 827,559,072.14 and 318,708,636.15

Step by Step Solution

1. Step 1: Write the proportion equation
   552,586,978.50 : 827,559,072.14 = 318,708,636.15 : x
2. Step 2: Convert to fraction form
   552,586,978.50/827,559,072.14 = 318,708,636.15/x
3. Step 3: Cross multiply
   552,586,978.50x = 827,559,072.14 × 318,708,636.15
4. Step 4: Simplify right side
   552,586,978.50x = 263,750,223,216,808,672
5. Step 5: Solve for x
   x = 263,750,223,216,808,672/552,586,978.50
6. Step 6: Final answer
   x = 477,300,829.52