Finding the Fourth Proportional to 13,003.18, 19,505.31 and 4,238.17

Step by Step Solution

1. Step 1: Write the proportion equation
   13,003.18 : 19,505.31 = 4,238.17 : x
2. Step 2: Convert to fraction form
   13,003.18/19,505.31 = 4,238.17/x
3. Step 3: Cross multiply
   13,003.18x = 19,505.31 × 4,238.17
4. Step 4: Simplify right side
   13,003.18x = 82,666,819.68
5. Step 5: Solve for x
   x = 82,666,819.68/13,003.18
6. Step 6: Final answer
   x = 6,357.43