Finding the Fourth Proportional to 78,510.58, 108,343.80 and 42,700.88

Step by Step Solution

1. Step 1: Write the proportion equation
   78,510.58 : 108,343.80 = 42,700.88 : x
2. Step 2: Convert to fraction form
   78,510.58/108,343.80 = 42,700.88/x
3. Step 3: Cross multiply
   78,510.58x = 108,343.80 × 42,700.88
4. Step 4: Simplify right side
   78,510.58x = 4,626,375,602.54
5. Step 5: Solve for x
   x = 4,626,375,602.54/78,510.58
6. Step 6: Final answer
   x = 58,926.78