Finding the Fourth Proportional to 78,680.56, 108,577.80 and 42,870.82

Step by Step Solution

1. Step 1: Write the proportion equation
   78,680.56 : 108,577.80 = 42,870.82 : x
2. Step 2: Convert to fraction form
   78,680.56/108,577.80 = 42,870.82/x
3. Step 3: Cross multiply
   78,680.56x = 108,577.80 × 42,870.82
4. Step 4: Simplify right side
   78,680.56x = 4,654,819,319.80
5. Step 5: Solve for x
   x = 4,654,819,319.80/78,680.56
6. Step 6: Final answer
   x = 59,160.98