Finding the Fourth Proportional to 13,055.90, 18,016.88 and 7,390.52

Step by Step Solution

1. Step 1: Write the proportion equation
   13,055.90 : 18,016.88 = 7,390.52 : x
2. Step 2: Convert to fraction form
   13,055.90/18,016.88 = 7,390.52/x
3. Step 3: Cross multiply
   13,055.90x = 18,016.88 × 7,390.52
4. Step 4: Simplify right side
   13,055.90x = 133,154,111.98
5. Step 5: Solve for x
   x = 133,154,111.98/13,055.90
6. Step 6: Final answer
   x = 10,198.77