Finding the Fourth Proportional to 76,293.62, 105,280.98 and 42,300.12

Step by Step Solution

1. Step 1: Write the proportion equation
   76,293.62 : 105,280.98 = 42,300.12 : x
2. Step 2: Convert to fraction form
   76,293.62/105,280.98 = 42,300.12/x
3. Step 3: Cross multiply
   76,293.62x = 105,280.98 × 42,300.12
4. Step 4: Simplify right side
   76,293.62x = 4,453,398,087.72
5. Step 5: Solve for x
   x = 4,453,398,087.72/76,293.62
6. Step 6: Final answer
   x = 58,371.83