Finding the Fourth Proportional to 78,509.98, 108,343.46 and 42,700.59

Step by Step Solution

1. Step 1: Write the proportion equation
   78,509.98 : 108,343.46 = 42,700.59 : x
2. Step 2: Convert to fraction form
   78,509.98/108,343.46 = 42,700.59/x
3. Step 3: Cross multiply
   78,509.98x = 108,343.46 × 42,700.59
4. Step 4: Simplify right side
   78,509.98x = 4,626,329,122.92
5. Step 5: Solve for x
   x = 4,626,329,122.92/78,509.98
6. Step 6: Final answer
   x = 58,926.64