Finding the Fourth Proportional to 21,861.52, 30,168.88 and 11,925.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,861.52 : 30,168.88 = 11,925.52 : x
2. Step 2: Convert to fraction form
   21,861.52/30,168.88 = 11,925.52/x
3. Step 3: Cross multiply
   21,861.52x = 30,168.88 × 11,925.52
4. Step 4: Simplify right side
   21,861.52x = 359,779,581.82
5. Step 5: Solve for x
   x = 359,779,581.82/21,861.52
6. Step 6: Final answer
   x = 16,457.21