Finding the Fourth Proportional to 10,428.72, 14,393.88 and 5,953.20

Step by Step Solution

1. Step 1: Write the proportion equation
   10,428.72 : 14,393.88 = 5,953.20 : x
2. Step 2: Convert to fraction form
   10,428.72/14,393.88 = 5,953.20/x
3. Step 3: Cross multiply
   10,428.72x = 14,393.88 × 5,953.20
4. Step 4: Simplify right side
   10,428.72x = 85,689,646.42
5. Step 5: Solve for x
   x = 85,689,646.42/10,428.72
6. Step 6: Final answer
   x = 8,216.70