Finding the Fourth Proportional to 113,433.86, 156,528.24 and 65,690.30

Step by Step Solution

1. Step 1: Write the proportion equation
   113,433.86 : 156,528.24 = 65,690.30 : x
2. Step 2: Convert to fraction form
   113,433.86/156,528.24 = 65,690.30/x
3. Step 3: Cross multiply
   113,433.86x = 156,528.24 × 65,690.30
4. Step 4: Simplify right side
   113,433.86x = 10,282,387,044.07
5. Step 5: Solve for x
   x = 10,282,387,044.07/113,433.86
6. Step 6: Final answer
   x = 90,646.54