Finding the Fourth Proportional to 99,402.41, 137,173.86 and 54,080.79

Step by Step Solution

1. Step 1: Write the proportion equation
   99,402.41 : 137,173.86 = 54,080.79 : x
2. Step 2: Convert to fraction form
   99,402.41/137,173.86 = 54,080.79/x
3. Step 3: Cross multiply
   99,402.41x = 137,173.86 × 54,080.79
4. Step 4: Simplify right side
   99,402.41x = 7,418,470,716.15
5. Step 5: Solve for x
   x = 7,418,470,716.15/99,402.41
6. Step 6: Final answer
   x = 74,630.70