Finding the Fourth Proportional to 13,238.98, 18,268.56 and 7,572.76

Step by Step Solution

1. Step 1: Write the proportion equation
   13,238.98 : 18,268.56 = 7,572.76 : x
2. Step 2: Convert to fraction form
   13,238.98/18,268.56 = 7,572.76/x
3. Step 3: Cross multiply
   13,238.98x = 18,268.56 × 7,572.76
4. Step 4: Simplify right side
   13,238.98x = 138,343,420.43
5. Step 5: Solve for x
   x = 138,343,420.43/13,238.98
6. Step 6: Final answer
   x = 10,449.70