Finding the Fourth Proportional to 13,607.41, 18,777.86 and 7,557.47

Step by Step Solution

1. Step 1: Write the proportion equation
   13,607.41 : 18,777.86 = 7,557.47 : x
2. Step 2: Convert to fraction form
   13,607.41/18,777.86 = 7,557.47/x
3. Step 3: Cross multiply
   13,607.41x = 18,777.86 × 7,557.47
4. Step 4: Simplify right side
   13,607.41x = 141,913,019.72
5. Step 5: Solve for x
   x = 141,913,019.72/13,607.41
6. Step 6: Final answer
   x = 10,429.10