Finding the Fourth Proportional to 72,111.12, 108,167.28 and 19,521.12

Step by Step Solution

1. Step 1: Write the proportion equation
   72,111.12 : 108,167.28 = 19,521.12 : x
2. Step 2: Convert to fraction form
   72,111.12/108,167.28 = 19,521.12/x
3. Step 3: Cross multiply
   72,111.12x = 108,167.28 × 19,521.12
4. Step 4: Simplify right side
   72,111.12x = 2,111,546,452.95
5. Step 5: Solve for x
   x = 2,111,546,452.95/72,111.12
6. Step 6: Final answer
   x = 29,281.84