Finding the Fourth Proportional to 13,545.56, 18,693.71 and 7,577.63

Step by Step Solution

1. Step 1: Write the proportion equation
   13,545.56 : 18,693.71 = 7,577.63 : x
2. Step 2: Convert to fraction form
   13,545.56/18,693.71 = 7,577.63/x
3. Step 3: Cross multiply
   13,545.56x = 18,693.71 × 7,577.63
4. Step 4: Simplify right side
   13,545.56x = 141,654,017.71
5. Step 5: Solve for x
   x = 141,654,017.71/13,545.56
6. Step 6: Final answer
   x = 10,457.60