Finding the Fourth Proportional to 71,921.34, 99,249.17 and 45,078.35

Step by Step Solution

1. Step 1: Write the proportion equation
   71,921.34 : 99,249.17 = 45,078.35 : x
2. Step 2: Convert to fraction form
   71,921.34/99,249.17 = 45,078.35/x
3. Step 3: Cross multiply
   71,921.34x = 99,249.17 × 45,078.35
4. Step 4: Simplify right side
   71,921.34x = 4,473,988,100.83
5. Step 5: Solve for x
   x = 4,473,988,100.83/71,921.34
6. Step 6: Final answer
   x = 62,206.68