Finding the Fourth Proportional to 78,680.22, 108,575.65 and 42,870.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,680.22 : 108,575.65 = 42,870.50 : x
2. Step 2: Convert to fraction form
   78,680.22/108,575.65 = 42,870.50/x
3. Step 3: Cross multiply
   78,680.22x = 108,575.65 × 42,870.50
4. Step 4: Simplify right side
   78,680.22x = 4,654,691,646.09
5. Step 5: Solve for x
   x = 4,654,691,646.09/78,680.22
6. Step 6: Final answer
   x = 59,159.62