Finding the Fourth Proportional to 78,680.34, 108,575.82 and 42,870.62

Step by Step Solution

1. Step 1: Write the proportion equation
   78,680.34 : 108,575.82 = 42,870.62 : x
2. Step 2: Convert to fraction form
   78,680.34/108,575.82 = 42,870.62/x
3. Step 3: Cross multiply
   78,680.34x = 108,575.82 × 42,870.62
4. Step 4: Simplify right side
   78,680.34x = 4,654,712,448.97
5. Step 5: Solve for x
   x = 4,654,712,448.97/78,680.34
6. Step 6: Final answer
   x = 59,159.79