Finding the Fourth Proportional to 103,018.88, 154,279.17 and 89,068.55

Step by Step Solution

1. Step 1: Write the proportion equation
   103,018.88 : 154,279.17 = 89,068.55 : x
2. Step 2: Convert to fraction form
   103,018.88/154,279.17 = 89,068.55/x
3. Step 3: Cross multiply
   103,018.88x = 154,279.17 × 89,068.55
4. Step 4: Simplify right side
   103,018.88x = 13,741,421,195.71
5. Step 5: Solve for x
   x = 13,741,421,195.71/103,018.88
6. Step 6: Final answer
   x = 133,387.41