Finding the Fourth Proportional to 113,153.64, 156,154.50 and 65,409

Step by Step Solution

1. Step 1: Write the proportion equation
   113,153.64 : 156,154.50 = 65,409 : x
2. Step 2: Convert to fraction form
   113,153.64/156,154.50 = 65,409/x
3. Step 3: Cross multiply
   113,153.64x = 156,154.50 × 65,409
4. Step 4: Simplify right side
   113,153.64x = 10,213,909,690.50
5. Step 5: Solve for x
   x = 10,213,909,690.50/113,153.64
6. Step 6: Final answer
   x = 90,265.85