Finding the Fourth Proportional to 99,378.39, 137,151.86 and 74,184.15

Step by Step Solution

1. Step 1: Write the proportion equation
   99,378.39 : 137,151.86 = 74,184.15 : x
2. Step 2: Convert to fraction form
   99,378.39/137,151.86 = 74,184.15/x
3. Step 3: Cross multiply
   99,378.39x = 137,151.86 × 74,184.15
4. Step 4: Simplify right side
   99,378.39x = 10,174,493,784.10
5. Step 5: Solve for x
   x = 10,174,493,784.10/99,378.39
6. Step 6: Final answer
   x = 102,381.35