Finding the Fourth Proportional to 24,900, 34,362.72 and 13,722.72

Step by Step Solution

1. Step 1: Write the proportion equation
   24,900 : 34,362.72 = 13,722.72 : x
2. Step 2: Convert to fraction form
   24,900/34,362.72 = 13,722.72/x
3. Step 3: Cross multiply
   24,900x = 34,362.72 × 13,722.72
4. Step 4: Simplify right side
   24,900x = 471,549,985.00
5. Step 5: Solve for x
   x = 471,549,985.00/24,900
6. Step 6: Final answer
   x = 18,937.75