Finding the Fourth Proportional to 89,576.72, 134,254.04 and 78,504.96

Step by Step Solution

1. Step 1: Write the proportion equation
   89,576.72 : 134,254.04 = 78,504.96 : x
2. Step 2: Convert to fraction form
   89,576.72/134,254.04 = 78,504.96/x
3. Step 3: Cross multiply
   89,576.72x = 134,254.04 × 78,504.96
4. Step 4: Simplify right side
   89,576.72x = 10,539,608,040.04
5. Step 5: Solve for x
   x = 10,539,608,040.04/89,576.72
6. Step 6: Final answer
   x = 117,660.12