Finding the Fourth Proportional to 105,643, 145,761.24 and 62,632.57

Step by Step Solution

1. Step 1: Write the proportion equation
   105,643 : 145,761.24 = 62,632.57 : x
2. Step 2: Convert to fraction form
   105,643/145,761.24 = 62,632.57/x
3. Step 3: Cross multiply
   105,643x = 145,761.24 × 62,632.57
4. Step 4: Simplify right side
   105,643x = 9,129,401,067.59
5. Step 5: Solve for x
   x = 9,129,401,067.59/105,643
6. Step 6: Final answer
   x = 86,417.47