Finding the Fourth Proportional to 78,150.84, 116,891.34 and 72,478.32

Step by Step Solution

1. Step 1: Write the proportion equation
   78,150.84 : 116,891.34 = 72,478.32 : x
2. Step 2: Convert to fraction form
   78,150.84/116,891.34 = 72,478.32/x
3. Step 3: Cross multiply
   78,150.84x = 116,891.34 × 72,478.32
4. Step 4: Simplify right side
   78,150.84x = 8,472,087,945.75
5. Step 5: Solve for x
   x = 8,472,087,945.75/78,150.84
6. Step 6: Final answer
   x = 108,406.87