Finding the Fourth Proportional to 112,766.48, 155,617.72 and 61,781.01

Step by Step Solution

1. Step 1: Write the proportion equation
   112,766.48 : 155,617.72 = 61,781.01 : x
2. Step 2: Convert to fraction form
   112,766.48/155,617.72 = 61,781.01/x
3. Step 3: Cross multiply
   112,766.48x = 155,617.72 × 61,781.01
4. Step 4: Simplify right side
   112,766.48x = 9,614,220,499.31
5. Step 5: Solve for x
   x = 9,614,220,499.31/112,766.48
6. Step 6: Final answer
   x = 85,257.79