Finding the Fourth Proportional to 78,680.52, 108,579.14 and 42,870.53

Step by Step Solution

1. Step 1: Write the proportion equation
   78,680.52 : 108,579.14 = 42,870.53 : x
2. Step 2: Convert to fraction form
   78,680.52/108,579.14 = 42,870.53/x
3. Step 3: Cross multiply
   78,680.52x = 108,579.14 × 42,870.53
4. Step 4: Simplify right side
   78,680.52x = 4,654,845,755.78
5. Step 5: Solve for x
   x = 4,654,845,755.78/78,680.52
6. Step 6: Final answer
   x = 59,161.35