Finding the Fourth Proportional to 90,054.72, 124,286.40 and 56,514.24

Step by Step Solution

1. Step 1: Write the proportion equation
   90,054.72 : 124,286.40 = 56,514.24 : x
2. Step 2: Convert to fraction form
   90,054.72/124,286.40 = 56,514.24/x
3. Step 3: Cross multiply
   90,054.72x = 124,286.40 × 56,514.24
4. Step 4: Simplify right side
   90,054.72x = 7,023,951,438.34
5. Step 5: Solve for x
   x = 7,023,951,438.34/90,054.72
6. Step 6: Final answer
   x = 77,996.48