Finding the Fourth Proportional to 65,711.72, 98,510.73 and 55,781.35

Step by Step Solution

1. Step 1: Write the proportion equation
   65,711.72 : 98,510.73 = 55,781.35 : x
2. Step 2: Convert to fraction form
   65,711.72/98,510.73 = 55,781.35/x
3. Step 3: Cross multiply
   65,711.72x = 98,510.73 × 55,781.35
4. Step 4: Simplify right side
   65,711.72x = 5,495,061,053.43
5. Step 5: Solve for x
   x = 5,495,061,053.43/65,711.72
6. Step 6: Final answer
   x = 83,623.76