Finding the Fourth Proportional to 1,238.72, 1,858.16 and 1,010.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,238.72 : 1,858.16 = 1,010.24 : x
2. Step 2: Convert to fraction form
   1,238.72/1,858.16 = 1,010.24/x
3. Step 3: Cross multiply
   1,238.72x = 1,858.16 × 1,010.24
4. Step 4: Simplify right side
   1,238.72x = 1,877,187.56
5. Step 5: Solve for x
   x = 1,877,187.56/1,238.72
6. Step 6: Final answer
   x = 1,515.43