Finding the Fourth Proportional to 78,680.67, 108,577.95 and 42,870.98

Step by Step Solution

1. Step 1: Write the proportion equation
   78,680.67 : 108,577.95 = 42,870.98 : x
2. Step 2: Convert to fraction form
   78,680.67/108,577.95 = 42,870.98/x
3. Step 3: Cross multiply
   78,680.67x = 108,577.95 × 42,870.98
4. Step 4: Simplify right side
   78,680.67x = 4,654,843,122.89
5. Step 5: Solve for x
   x = 4,654,843,122.89/78,680.67
6. Step 6: Final answer
   x = 59,161.20