Finding the Fourth Proportional to 35,111.16, 48,454.32 and 20,972.16

Step by Step Solution

1. Step 1: Write the proportion equation
   35,111.16 : 48,454.32 = 20,972.16 : x
2. Step 2: Convert to fraction form
   35,111.16/48,454.32 = 20,972.16/x
3. Step 3: Cross multiply
   35,111.16x = 48,454.32 × 20,972.16
4. Step 4: Simplify right side
   35,111.16x = 1,016,191,751.73
5. Step 5: Solve for x
   x = 1,016,191,751.73/35,111.16
6. Step 6: Final answer
   x = 28,942.13