Finding the Fourth Proportional to 81,098.96, 111,969.22 and 72,586.34

Step by Step Solution

1. Step 1: Write the proportion equation
   81,098.96 : 111,969.22 = 72,586.34 : x
2. Step 2: Convert to fraction form
   81,098.96/111,969.22 = 72,586.34/x
3. Step 3: Cross multiply
   81,098.96x = 111,969.22 × 72,586.34
4. Step 4: Simplify right side
   81,098.96x = 8,127,435,872.45
5. Step 5: Solve for x
   x = 8,127,435,872.45/81,098.96
6. Step 6: Final answer
   x = 100,216.28