Finding the Fourth Proportional to 12,188.31, 16,820.18 and 7,475.19

Step by Step Solution

1. Step 1: Write the proportion equation
   12,188.31 : 16,820.18 = 7,475.19 : x
2. Step 2: Convert to fraction form
   12,188.31/16,820.18 = 7,475.19/x
3. Step 3: Cross multiply
   12,188.31x = 16,820.18 × 7,475.19
4. Step 4: Simplify right side
   12,188.31x = 125,734,041.33
5. Step 5: Solve for x
   x = 125,734,041.33/12,188.31
6. Step 6: Final answer
   x = 10,315.95