Finding the Fourth Proportional to 12,290.02, 18,420.57 and 5,702.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,290.02 : 18,420.57 = 5,702.32 : x
2. Step 2: Convert to fraction form
   12,290.02/18,420.57 = 5,702.32/x
3. Step 3: Cross multiply
   12,290.02x = 18,420.57 × 5,702.32
4. Step 4: Simplify right side
   12,290.02x = 105,039,984.72
5. Step 5: Solve for x
   x = 105,039,984.72/12,290.02
6. Step 6: Final answer
   x = 8,546.77