Finding the Fourth Proportional to 9,290.77, 12,820.81 and 5,312.32

Step by Step Solution

1. Step 1: Write the proportion equation
   9,290.77 : 12,820.81 = 5,312.32 : x
2. Step 2: Convert to fraction form
   9,290.77/12,820.81 = 5,312.32/x
3. Step 3: Cross multiply
   9,290.77x = 12,820.81 × 5,312.32
4. Step 4: Simplify right side
   9,290.77x = 68,108,154.71
5. Step 5: Solve for x
   x = 68,108,154.71/9,290.77
6. Step 6: Final answer
   x = 7,330.74