Finding the Fourth Proportional to 13,610.23, 18,784.06 and 7,642.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,610.23 : 18,784.06 = 7,642.31 : x
2. Step 2: Convert to fraction form
   13,610.23/18,784.06 = 7,642.31/x
3. Step 3: Cross multiply
   13,610.23x = 18,784.06 × 7,642.31
4. Step 4: Simplify right side
   13,610.23x = 143,553,496.55
5. Step 5: Solve for x
   x = 143,553,496.55/13,610.23
6. Step 6: Final answer
   x = 10,547.47