Finding the Fourth Proportional to 78,756.20, 108,679.56 and 42,945.92

Step by Step Solution

1. Step 1: Write the proportion equation
   78,756.20 : 108,679.56 = 42,945.92 : x
2. Step 2: Convert to fraction form
   78,756.20/108,679.56 = 42,945.92/x
3. Step 3: Cross multiply
   78,756.20x = 108,679.56 × 42,945.92
4. Step 4: Simplify right side
   78,756.20x = 4,667,343,689.40
5. Step 5: Solve for x
   x = 4,667,343,689.40/78,756.20
6. Step 6: Final answer
   x = 59,263.19