Finding the Fourth Proportional to 76,856.20, 106,061.32 and 42,864.72

Step by Step Solution

1. Step 1: Write the proportion equation
   76,856.20 : 106,061.32 = 42,864.72 : x
2. Step 2: Convert to fraction form
   76,856.20/106,061.32 = 42,864.72/x
3. Step 3: Cross multiply
   76,856.20x = 106,061.32 × 42,864.72
4. Step 4: Simplify right side
   76,856.20x = 4,546,288,784.63
5. Step 5: Solve for x
   x = 4,546,288,784.63/76,856.20
6. Step 6: Final answer
   x = 59,153.18