Finding the Fourth Proportional to 8,300.10, 12,442.05 and 7,425.30

Step by Step Solution

1. Step 1: Write the proportion equation
   8,300.10 : 12,442.05 = 7,425.30 : x
2. Step 2: Convert to fraction form
   8,300.10/12,442.05 = 7,425.30/x
3. Step 3: Cross multiply
   8,300.10x = 12,442.05 × 7,425.30
4. Step 4: Simplify right side
   8,300.10x = 92,385,953.87
5. Step 5: Solve for x
   x = 92,385,953.87/8,300.10
6. Step 6: Final answer
   x = 11,130.70