Finding the Fourth Proportional to 81,730.76, 112,851.43 and 65,885.94

Step by Step Solution

1. Step 1: Write the proportion equation
   81,730.76 : 112,851.43 = 65,885.94 : x
2. Step 2: Convert to fraction form
   81,730.76/112,851.43 = 65,885.94/x
3. Step 3: Cross multiply
   81,730.76x = 112,851.43 × 65,885.94
4. Step 4: Simplify right side
   81,730.76x = 7,435,322,381.18
5. Step 5: Solve for x
   x = 7,435,322,381.18/81,730.76
6. Step 6: Final answer
   x = 90,973.37