Finding the Fourth Proportional to 78,513.22, 117,698.55 and 28,558.00

Step by Step Solution

1. Step 1: Write the proportion equation
   78,513.22 : 117,698.55 = 28,558.00 : x
2. Step 2: Convert to fraction form
   78,513.22/117,698.55 = 28,558.00/x
3. Step 3: Cross multiply
   78,513.22x = 117,698.55 × 28,558.00
4. Step 4: Simplify right side
   78,513.22x = 3,361,234,602.41
5. Step 5: Solve for x
   x = 3,361,234,602.41/78,513.22
6. Step 6: Final answer
   x = 42,811.07