Finding the Fourth Proportional to 76,144.61, 105,078.30 and 42,152.39

Step by Step Solution

1. Step 1: Write the proportion equation
   76,144.61 : 105,078.30 = 42,152.39 : x
2. Step 2: Convert to fraction form
   76,144.61/105,078.30 = 42,152.39/x
3. Step 3: Cross multiply
   76,144.61x = 105,078.30 × 42,152.39
4. Step 4: Simplify right side
   76,144.61x = 4,429,301,586.76
5. Step 5: Solve for x
   x = 4,429,301,586.76/76,144.61
6. Step 6: Final answer
   x = 58,169.60