Finding the Fourth Proportional to 78,679.46, 108,578.94 and 42,870.98

Step by Step Solution

1. Step 1: Write the proportion equation
   78,679.46 : 108,578.94 = 42,870.98 : x
2. Step 2: Convert to fraction form
   78,679.46/108,578.94 = 42,870.98/x
3. Step 3: Cross multiply
   78,679.46x = 108,578.94 × 42,870.98
4. Step 4: Simplify right side
   78,679.46x = 4,654,885,565.16
5. Step 5: Solve for x
   x = 4,654,885,565.16/78,679.46
6. Step 6: Final answer
   x = 59,162.65