Finding the Fourth Proportional to 110,796.72, 152,715.36 and 78,489.87

Step by Step Solution

1. Step 1: Write the proportion equation
   110,796.72 : 152,715.36 = 78,489.87 : x
2. Step 2: Convert to fraction form
   110,796.72/152,715.36 = 78,489.87/x
3. Step 3: Cross multiply
   110,796.72x = 152,715.36 × 78,489.87
4. Step 4: Simplify right side
   110,796.72x = 11,986,608,753.40
5. Step 5: Solve for x
   x = 11,986,608,753.40/110,796.72
6. Step 6: Final answer
   x = 108,185.59