Finding the Fourth Proportional to 13,570.72, 18,728.80 and 7,602.35

Step by Step Solution

1. Step 1: Write the proportion equation
   13,570.72 : 18,728.80 = 7,602.35 : x
2. Step 2: Convert to fraction form
   13,570.72/18,728.80 = 7,602.35/x
3. Step 3: Cross multiply
   13,570.72x = 18,728.80 × 7,602.35
4. Step 4: Simplify right side
   13,570.72x = 142,382,780.03
5. Step 5: Solve for x
   x = 142,382,780.03/13,570.72
6. Step 6: Final answer
   x = 10,491.91