Finding the Fourth Proportional to 13,445.61, 18,555.06 and 7,477.93

Step by Step Solution

1. Step 1: Write the proportion equation
   13,445.61 : 18,555.06 = 7,477.93 : x
2. Step 2: Convert to fraction form
   13,445.61/18,555.06 = 7,477.93/x
3. Step 3: Cross multiply
   13,445.61x = 18,555.06 × 7,477.93
4. Step 4: Simplify right side
   13,445.61x = 138,753,439.83
5. Step 5: Solve for x
   x = 138,753,439.83/13,445.61
6. Step 6: Final answer
   x = 10,319.61