Finding the Fourth Proportional to 76,143.05, 105,078.24 and 42,152.10

Step by Step Solution

1. Step 1: Write the proportion equation
   76,143.05 : 105,078.24 = 42,152.10 : x
2. Step 2: Convert to fraction form
   76,143.05/105,078.24 = 42,152.10/x
3. Step 3: Cross multiply
   76,143.05x = 105,078.24 × 42,152.10
4. Step 4: Simplify right side
   76,143.05x = 4,429,268,374.92
5. Step 5: Solve for x
   x = 4,429,268,374.92/76,143.05
6. Step 6: Final answer
   x = 58,170.36