Finding the Fourth Proportional to 105,470.30, 145,507.38 and 65,114.04

Step by Step Solution

1. Step 1: Write the proportion equation
   105,470.30 : 145,507.38 = 65,114.04 : x
2. Step 2: Convert to fraction form
   105,470.30/145,507.38 = 65,114.04/x
3. Step 3: Cross multiply
   105,470.30x = 145,507.38 × 65,114.04
4. Step 4: Simplify right side
   105,470.30x = 9,474,573,361.62
5. Step 5: Solve for x
   x = 9,474,573,361.62/105,470.30
6. Step 6: Final answer
   x = 89,831.67