Finding the Fourth Proportional to 91,614.65, 136,693.58 and 80,395.34

Step by Step Solution

1. Step 1: Write the proportion equation
   91,614.65 : 136,693.58 = 80,395.34 : x
2. Step 2: Convert to fraction form
   91,614.65/136,693.58 = 80,395.34/x
3. Step 3: Cross multiply
   91,614.65x = 136,693.58 × 80,395.34
4. Step 4: Simplify right side
   91,614.65x = 10,989,525,754.47
5. Step 5: Solve for x
   x = 10,989,525,754.47/91,614.65
6. Step 6: Final answer
   x = 119,953.81