Finding the Fourth Proportional to 103,597.72, 142,913.10 and 65,404.60

Step by Step Solution

1. Step 1: Write the proportion equation
   103,597.72 : 142,913.10 = 65,404.60 : x
2. Step 2: Convert to fraction form
   103,597.72/142,913.10 = 65,404.60/x
3. Step 3: Cross multiply
   103,597.72x = 142,913.10 × 65,404.60
4. Step 4: Simplify right side
   103,597.72x = 9,347,174,140.26
5. Step 5: Solve for x
   x = 9,347,174,140.26/103,597.72
6. Step 6: Final answer
   x = 90,225.67