Finding the Fourth Proportional to 9,290.43, 12,820.54 and 5,655.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,290.43 : 12,820.54 = 5,655.12 : x
2. Step 2: Convert to fraction form
   9,290.43/12,820.54 = 5,655.12/x
3. Step 3: Cross multiply
   9,290.43x = 12,820.54 × 5,655.12
4. Step 4: Simplify right side
   9,290.43x = 72,501,692.16
5. Step 5: Solve for x
   x = 72,501,692.16/9,290.43
6. Step 6: Final answer
   x = 7,803.91