Finding the Fourth Proportional to 78,679.56, 108,576.42 and 42,869.82

Step by Step Solution

1. Step 1: Write the proportion equation
   78,679.56 : 108,576.42 = 42,869.82 : x
2. Step 2: Convert to fraction form
   78,679.56/108,576.42 = 42,869.82/x
3. Step 3: Cross multiply
   78,679.56x = 108,576.42 × 42,869.82
4. Step 4: Simplify right side
   78,679.56x = 4,654,651,581.64
5. Step 5: Solve for x
   x = 4,654,651,581.64/78,679.56
6. Step 6: Final answer
   x = 59,159.60