Finding the Fourth Proportional to 9,390.50, 12,959.16 and 5,199.02

Step by Step Solution

1. Step 1: Write the proportion equation
   9,390.50 : 12,959.16 = 5,199.02 : x
2. Step 2: Convert to fraction form
   9,390.50/12,959.16 = 5,199.02/x
3. Step 3: Cross multiply
   9,390.50x = 12,959.16 × 5,199.02
4. Step 4: Simplify right side
   9,390.50x = 67,374,932.02
5. Step 5: Solve for x
   x = 67,374,932.02/9,390.50
6. Step 6: Final answer
   x = 7,174.80