Finding the Fourth Proportional to 78,679.67, 108,576.58 and 42,869.98

Step by Step Solution

1. Step 1: Write the proportion equation
   78,679.67 : 108,576.58 = 42,869.98 : x
2. Step 2: Convert to fraction form
   78,679.67/108,576.58 = 42,869.98/x
3. Step 3: Cross multiply
   78,679.67x = 108,576.58 × 42,869.98
4. Step 4: Simplify right side
   78,679.67x = 4,654,675,055.84
5. Step 5: Solve for x
   x = 4,654,675,055.84/78,679.67
6. Step 6: Final answer
   x = 59,159.82