Finding the Fourth Proportional to 9,290.32, 12,816.60 and 5,309.98

Step by Step Solution

1. Step 1: Write the proportion equation
   9,290.32 : 12,816.60 = 5,309.98 : x
2. Step 2: Convert to fraction form
   9,290.32/12,816.60 = 5,309.98/x
3. Step 3: Cross multiply
   9,290.32x = 12,816.60 × 5,309.98
4. Step 4: Simplify right side
   9,290.32x = 68,055,889.67
5. Step 5: Solve for x
   x = 68,055,889.67/9,290.32
6. Step 6: Final answer
   x = 7,325.46