Finding the Fourth Proportional to 13,861.72, 19,128.26 and 7,574.08

Step by Step Solution

1. Step 1: Write the proportion equation
   13,861.72 : 19,128.26 = 7,574.08 : x
2. Step 2: Convert to fraction form
   13,861.72/19,128.26 = 7,574.08/x
3. Step 3: Cross multiply
   13,861.72x = 19,128.26 × 7,574.08
4. Step 4: Simplify right side
   13,861.72x = 144,878,971.50
5. Step 5: Solve for x
   x = 144,878,971.50/13,861.72
6. Step 6: Final answer
   x = 10,451.73