Finding the Fourth Proportional to 78,738.10, 108,659.75 and 42,928.71

Step by Step Solution

1. Step 1: Write the proportion equation
   78,738.10 : 108,659.75 = 42,928.71 : x
2. Step 2: Convert to fraction form
   78,738.10/108,659.75 = 42,928.71/x
3. Step 3: Cross multiply
   78,738.10x = 108,659.75 × 42,928.71
4. Step 4: Simplify right side
   78,738.10x = 4,664,622,896.42
5. Step 5: Solve for x
   x = 4,664,622,896.42/78,738.10
6. Step 6: Final answer
   x = 59,242.26