Finding the Fourth Proportional to 103,594.72, 142,908.96 and 65,401.60

Step by Step Solution

1. Step 1: Write the proportion equation
   103,594.72 : 142,908.96 = 65,401.60 : x
2. Step 2: Convert to fraction form
   103,594.72/142,908.96 = 65,401.60/x
3. Step 3: Cross multiply
   103,594.72x = 142,908.96 × 65,401.60
4. Step 4: Simplify right side
   103,594.72x = 9,346,474,638.34
5. Step 5: Solve for x
   x = 9,346,474,638.34/103,594.72
6. Step 6: Final answer
   x = 90,221.53