Finding the Fourth Proportional to 76,856.40, 106,059.72 and 42,865.92

Step by Step Solution

1. Step 1: Write the proportion equation
   76,856.40 : 106,059.72 = 42,865.92 : x
2. Step 2: Convert to fraction form
   76,856.40/106,059.72 = 42,865.92/x
3. Step 3: Cross multiply
   76,856.40x = 106,059.72 × 42,865.92
4. Step 4: Simplify right side
   76,856.40x = 4,546,347,472.74
5. Step 5: Solve for x
   x = 4,546,347,472.74/76,856.40
6. Step 6: Final answer
   x = 59,153.79