Finding the Fourth Proportional to 78,510.72, 108,345.30 and 42,700.98

Step by Step Solution

1. Step 1: Write the proportion equation
   78,510.72 : 108,345.30 = 42,700.98 : x
2. Step 2: Convert to fraction form
   78,510.72/108,345.30 = 42,700.98/x
3. Step 3: Cross multiply
   78,510.72x = 108,345.30 × 42,700.98
4. Step 4: Simplify right side
   78,510.72x = 4,626,450,488.39
5. Step 5: Solve for x
   x = 4,626,450,488.39/78,510.72
6. Step 6: Final answer
   x = 58,927.63