Finding the Fourth Proportional to 72,160.32, 99,581.88 and 39,894.42

Step by Step Solution

1. Step 1: Write the proportion equation
   72,160.32 : 99,581.88 = 39,894.42 : x
2. Step 2: Convert to fraction form
   72,160.32/99,581.88 = 39,894.42/x
3. Step 3: Cross multiply
   72,160.32x = 99,581.88 × 39,894.42
4. Step 4: Simplify right side
   72,160.32x = 3,972,761,345.11
5. Step 5: Solve for x
   x = 3,972,761,345.11/72,160.32
6. Step 6: Final answer
   x = 55,054.65