Finding the Fourth Proportional to 13,943.90, 19,242.72 and 7,570.55

Step by Step Solution

1. Step 1: Write the proportion equation
   13,943.90 : 19,242.72 = 7,570.55 : x
2. Step 2: Convert to fraction form
   13,943.90/19,242.72 = 7,570.55/x
3. Step 3: Cross multiply
   13,943.90x = 19,242.72 × 7,570.55
4. Step 4: Simplify right side
   13,943.90x = 145,677,978.23
5. Step 5: Solve for x
   x = 145,677,978.23/13,943.90
6. Step 6: Final answer
   x = 10,447.44