Finding the Fourth Proportional to 78,380.49, 108,196.10 and 54,521.01

Step by Step Solution

1. Step 1: Write the proportion equation
   78,380.49 : 108,196.10 = 54,521.01 : x
2. Step 2: Convert to fraction form
   78,380.49/108,196.10 = 54,521.01/x
3. Step 3: Cross multiply
   78,380.49x = 108,196.10 × 54,521.01
4. Step 4: Simplify right side
   78,380.49x = 5,898,960,377.46
5. Step 5: Solve for x
   x = 5,898,960,377.46/78,380.49
6. Step 6: Final answer
   x = 75,260.57