Finding the Fourth Proportional to 81,061.68, 111,916.48 and 55,610.72

Step by Step Solution

1. Step 1: Write the proportion equation
   81,061.68 : 111,916.48 = 55,610.72 : x
2. Step 2: Convert to fraction form
   81,061.68/111,916.48 = 55,610.72/x
3. Step 3: Cross multiply
   81,061.68x = 111,916.48 × 55,610.72
4. Step 4: Simplify right side
   81,061.68x = 6,223,756,032.67
5. Step 5: Solve for x
   x = 6,223,756,032.67/81,061.68
6. Step 6: Final answer
   x = 76,778.03