Finding the Fourth Proportional to 120,097.28, 180,139.39 and 60,931.41

Step by Step Solution

1. Step 1: Write the proportion equation
   120,097.28 : 180,139.39 = 60,931.41 : x
2. Step 2: Convert to fraction form
   120,097.28/180,139.39 = 60,931.41/x
3. Step 3: Cross multiply
   120,097.28x = 180,139.39 × 60,931.41
4. Step 4: Simplify right side
   120,097.28x = 10,976,148,064.05
5. Step 5: Solve for x
   x = 10,976,148,064.05/120,097.28
6. Step 6: Final answer
   x = 91,393.81