Finding the Fourth Proportional to 13,630.23, 18,807.42 and 7,580.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,630.23 : 18,807.42 = 7,580.31 : x
2. Step 2: Convert to fraction form
   13,630.23/18,807.42 = 7,580.31/x
3. Step 3: Cross multiply
   13,630.23x = 18,807.42 × 7,580.31
4. Step 4: Simplify right side
   13,630.23x = 142,566,073.90
5. Step 5: Solve for x
   x = 142,566,073.90/13,630.23
6. Step 6: Final answer
   x = 10,459.55