Finding the Fourth Proportional to 74,293.05, 102,499.48 and 42,439.40

Step by Step Solution

1. Step 1: Write the proportion equation
   74,293.05 : 102,499.48 = 42,439.40 : x
2. Step 2: Convert to fraction form
   74,293.05/102,499.48 = 42,439.40/x
3. Step 3: Cross multiply
   74,293.05x = 102,499.48 × 42,439.40
4. Step 4: Simplify right side
   74,293.05x = 4,350,015,706.82
5. Step 5: Solve for x
   x = 4,350,015,706.82/74,293.05
6. Step 6: Final answer
   x = 58,552.12