Finding the Fourth Proportional to 100,271.33, 138,377.76 and 54,949.40

Step by Step Solution

1. Step 1: Write the proportion equation
   100,271.33 : 138,377.76 = 54,949.40 : x
2. Step 2: Convert to fraction form
   100,271.33/138,377.76 = 54,949.40/x
3. Step 3: Cross multiply
   100,271.33x = 138,377.76 × 54,949.40
4. Step 4: Simplify right side
   100,271.33x = 7,603,774,193.46
5. Step 5: Solve for x
   x = 7,603,774,193.46/100,271.33
6. Step 6: Final answer
   x = 75,831.99