Finding the Fourth Proportional to 108,371.98, 149,605.54 and 72,133.74

Step by Step Solution

1. Step 1: Write the proportion equation
   108,371.98 : 149,605.54 = 72,133.74 : x
2. Step 2: Convert to fraction form
   108,371.98/149,605.54 = 72,133.74/x
3. Step 3: Cross multiply
   108,371.98x = 149,605.54 × 72,133.74
4. Step 4: Simplify right side
   108,371.98x = 10,791,607,124.92
5. Step 5: Solve for x
   x = 10,791,607,124.92/108,371.98
6. Step 6: Final answer
   x = 99,579.31