Finding the Fourth Proportional to 12,895.20, 19,343.79 and 5,499.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,895.20 : 19,343.79 = 5,499.72 : x
2. Step 2: Convert to fraction form
   12,895.20/19,343.79 = 5,499.72/x
3. Step 3: Cross multiply
   12,895.20x = 19,343.79 × 5,499.72
4. Step 4: Simplify right side
   12,895.20x = 106,385,428.74
5. Step 5: Solve for x
   x = 106,385,428.74/12,895.20
6. Step 6: Final answer
   x = 8,250.00