Finding the Fourth Proportional to 23,281.68, 34,929 and 12,900.72

Step by Step Solution

1. Step 1: Write the proportion equation
   23,281.68 : 34,929 = 12,900.72 : x
2. Step 2: Convert to fraction form
   23,281.68/34,929 = 12,900.72/x
3. Step 3: Cross multiply
   23,281.68x = 34,929 × 12,900.72
4. Step 4: Simplify right side
   23,281.68x = 450,609,248.88
5. Step 5: Solve for x
   x = 450,609,248.88/23,281.68
6. Step 6: Final answer
   x = 19,354.67