Finding the Fourth Proportional to 9,020.61, 12,440.38 and 5,663.74

Step by Step Solution

1. Step 1: Write the proportion equation
   9,020.61 : 12,440.38 = 5,663.74 : x
2. Step 2: Convert to fraction form
   9,020.61/12,440.38 = 5,663.74/x
3. Step 3: Cross multiply
   9,020.61x = 12,440.38 × 5,663.74
4. Step 4: Simplify right side
   9,020.61x = 70,459,077.82
5. Step 5: Solve for x
   x = 70,459,077.82/9,020.61
6. Step 6: Final answer
   x = 7,810.90