Finding the Fourth Proportional to 98,943.71, 147,872.39 and 72,345.69

Step by Step Solution

1. Step 1: Write the proportion equation
   98,943.71 : 147,872.39 = 72,345.69 : x
2. Step 2: Convert to fraction form
   98,943.71/147,872.39 = 72,345.69/x
3. Step 3: Cross multiply
   98,943.71x = 147,872.39 × 72,345.69
4. Step 4: Simplify right side
   98,943.71x = 10,697,929,724.77
5. Step 5: Solve for x
   x = 10,697,929,724.77/98,943.71
6. Step 6: Final answer
   x = 108,121.38