Finding the Fourth Proportional to 57,566.39, 78,866.25 and 55,409.13

Step by Step Solution

1. Step 1: Write the proportion equation
   57,566.39 : 78,866.25 = 55,409.13 : x
2. Step 2: Convert to fraction form
   57,566.39/78,866.25 = 55,409.13/x
3. Step 3: Cross multiply
   57,566.39x = 78,866.25 × 55,409.13
4. Step 4: Simplify right side
   57,566.39x = 4,369,910,298.86
5. Step 5: Solve for x
   x = 4,369,910,298.86/57,566.39
6. Step 6: Final answer
   x = 75,910.79