Finding the Fourth Proportional to 99,388.71, 148,704.89 and 67,239.63

Step by Step Solution

1. Step 1: Write the proportion equation
   99,388.71 : 148,704.89 = 67,239.63 : x
2. Step 2: Convert to fraction form
   99,388.71/148,704.89 = 67,239.63/x
3. Step 3: Cross multiply
   99,388.71x = 148,704.89 × 67,239.63
4. Step 4: Simplify right side
   99,388.71x = 9,998,861,446.59
5. Step 5: Solve for x
   x = 9,998,861,446.59/99,388.71
6. Step 6: Final answer
   x = 100,603.59