Finding the Fourth Proportional to 13,623.77, 18,798.71 and 7,654.29

Step by Step Solution

1. Step 1: Write the proportion equation
   13,623.77 : 18,798.71 = 7,654.29 : x
2. Step 2: Convert to fraction form
   13,623.77/18,798.71 = 7,654.29/x
3. Step 3: Cross multiply
   13,623.77x = 18,798.71 × 7,654.29
4. Step 4: Simplify right side
   13,623.77x = 143,890,739.69
5. Step 5: Solve for x
   x = 143,890,739.69/13,623.77
6. Step 6: Final answer
   x = 10,561.75