Finding the Fourth Proportional to 100,380.92, 138,524.72 and 55,058.00

Step by Step Solution

1. Step 1: Write the proportion equation
   100,380.92 : 138,524.72 = 55,058.00 : x
2. Step 2: Convert to fraction form
   100,380.92/138,524.72 = 55,058.00/x
3. Step 3: Cross multiply
   100,380.92x = 138,524.72 × 55,058.00
4. Step 4: Simplify right side
   100,380.92x = 7,626,893,065.85
5. Step 5: Solve for x
   x = 7,626,893,065.85/100,380.92
6. Step 6: Final answer
   x = 75,979.51