Finding the Fourth Proportional to 86,549.81, 129,097.54 and 78,576.98

Step by Step Solution

1. Step 1: Write the proportion equation
   86,549.81 : 129,097.54 = 78,576.98 : x
2. Step 2: Convert to fraction form
   86,549.81/129,097.54 = 78,576.98/x
3. Step 3: Cross multiply
   86,549.81x = 129,097.54 × 78,576.98
4. Step 4: Simplify right side
   86,549.81x = 10,144,094,425.74
5. Step 5: Solve for x
   x = 10,144,094,425.74/86,549.81
6. Step 6: Final answer
   x = 117,205.28