Finding the Fourth Proportional to 103,595.72, 142,910.34 and 65,402.60

Step by Step Solution

1. Step 1: Write the proportion equation
   103,595.72 : 142,910.34 = 65,402.60 : x
2. Step 2: Convert to fraction form
   103,595.72/142,910.34 = 65,402.60/x
3. Step 3: Cross multiply
   103,595.72x = 142,910.34 × 65,402.60
4. Step 4: Simplify right side
   103,595.72x = 9,346,707,802.88
5. Step 5: Solve for x
   x = 9,346,707,802.88/103,595.72
6. Step 6: Final answer
   x = 90,222.91