Finding the Fourth Proportional to 78,057.08, 107,718.92 and 42,247.40

Step by Step Solution

1. Step 1: Write the proportion equation
   78,057.08 : 107,718.92 = 42,247.40 : x
2. Step 2: Convert to fraction form
   78,057.08/107,718.92 = 42,247.40/x
3. Step 3: Cross multiply
   78,057.08x = 107,718.92 × 42,247.40
4. Step 4: Simplify right side
   78,057.08x = 4,550,844,300.81
5. Step 5: Solve for x
   x = 4,550,844,300.81/78,057.08
6. Step 6: Final answer
   x = 58,301.49