Finding the Fourth Proportional to 137,578.96, 189,899.28 and 89,839.72

Step by Step Solution

1. Step 1: Write the proportion equation
   137,578.96 : 189,899.28 = 89,839.72 : x
2. Step 2: Convert to fraction form
   137,578.96/189,899.28 = 89,839.72/x
3. Step 3: Cross multiply
   137,578.96x = 189,899.28 × 89,839.72
4. Step 4: Simplify right side
   137,578.96x = 17,060,498,143.40
5. Step 5: Solve for x
   x = 17,060,498,143.40/137,578.96
6. Step 6: Final answer
   x = 124,005.14