Finding the Fourth Proportional to 105,781.50, 145,973.61 and 63,363.42

Step by Step Solution

1. Step 1: Write the proportion equation
   105,781.50 : 145,973.61 = 63,363.42 : x
2. Step 2: Convert to fraction form
   105,781.50/145,973.61 = 63,363.42/x
3. Step 3: Cross multiply
   105,781.50x = 145,973.61 × 63,363.42
4. Step 4: Simplify right side
   105,781.50x = 9,249,387,159.35
5. Step 5: Solve for x
   x = 9,249,387,159.35/105,781.50
6. Step 6: Final answer
   x = 87,438.61