Finding the Fourth Proportional to 59,890.80, 83,691.60 and 59,890.80

Step by Step Solution

1. Step 1: Write the proportion equation
   59,890.80 : 83,691.60 = 59,890.80 : x
2. Step 2: Convert to fraction form
   59,890.80/83,691.60 = 59,890.80/x
3. Step 3: Cross multiply
   59,890.80x = 83,691.60 × 59,890.80
4. Step 4: Simplify right side
   59,890.80x = 5,012,356,877.28
5. Step 5: Solve for x
   x = 5,012,356,877.28/59,890.80
6. Step 6: Final answer
   x = 83,691.60