Finding the Fourth Proportional to 78,724.18, 108,639.06 and 42,914.08

Step by Step Solution

1. Step 1: Write the proportion equation
   78,724.18 : 108,639.06 = 42,914.08 : x
2. Step 2: Convert to fraction form
   78,724.18/108,639.06 = 42,914.08/x
3. Step 3: Cross multiply
   78,724.18x = 108,639.06 × 42,914.08
4. Step 4: Simplify right side
   78,724.18x = 4,662,145,311.96
5. Step 5: Solve for x
   x = 4,662,145,311.96/78,724.18
6. Step 6: Final answer
   x = 59,221.26