Finding the Fourth Proportional to 21,166.72, 29,155.20 and 14,782.08

Step by Step Solution

1. Step 1: Write the proportion equation
   21,166.72 : 29,155.20 = 14,782.08 : x
2. Step 2: Convert to fraction form
   21,166.72/29,155.20 = 14,782.08/x
3. Step 3: Cross multiply
   21,166.72x = 29,155.20 × 14,782.08
4. Step 4: Simplify right side
   21,166.72x = 430,974,498.82
5. Step 5: Solve for x
   x = 430,974,498.82/21,166.72
6. Step 6: Final answer
   x = 20,360.95