Finding the Fourth Proportional to 76,145.52, 105,078.15 and 42,154.08

Step by Step Solution

1. Step 1: Write the proportion equation
   76,145.52 : 105,078.15 = 42,154.08 : x
2. Step 2: Convert to fraction form
   76,145.52/105,078.15 = 42,154.08/x
3. Step 3: Cross multiply
   76,145.52x = 105,078.15 × 42,154.08
4. Step 4: Simplify right side
   76,145.52x = 4,429,472,741.35
5. Step 5: Solve for x
   x = 4,429,472,741.35/76,145.52
6. Step 6: Final answer
   x = 58,171.15