Finding the Fourth Proportional to 108,104.71, 149,141.55 and 72,237.91

Step by Step Solution

1. Step 1: Write the proportion equation
   108,104.71 : 149,141.55 = 72,237.91 : x
2. Step 2: Convert to fraction form
   108,104.71/149,141.55 = 72,237.91/x
3. Step 3: Cross multiply
   108,104.71x = 149,141.55 × 72,237.91
4. Step 4: Simplify right side
   108,104.71x = 10,773,673,866.16
5. Step 5: Solve for x
   x = 10,773,673,866.16/108,104.71
6. Step 6: Final answer
   x = 99,659.62