Finding the Fourth Proportional to 12,499.92, 18,746.10 and 10,303.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,499.92 : 18,746.10 = 10,303.20 : x
2. Step 2: Convert to fraction form
   12,499.92/18,746.10 = 10,303.20/x
3. Step 3: Cross multiply
   12,499.92x = 18,746.10 × 10,303.20
4. Step 4: Simplify right side
   12,499.92x = 193,144,817.52
5. Step 5: Solve for x
   x = 193,144,817.52/12,499.92
6. Step 6: Final answer
   x = 15,451.68