Finding the Fourth Proportional to 1,225.72, 1,837.38 and 938.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,225.72 : 1,837.38 = 938.36 : x
2. Step 2: Convert to fraction form
   1,225.72/1,837.38 = 938.36/x
3. Step 3: Cross multiply
   1,225.72x = 1,837.38 × 938.36
4. Step 4: Simplify right side
   1,225.72x = 1,724,123.90
5. Step 5: Solve for x
   x = 1,724,123.90/1,225.72
6. Step 6: Final answer
   x = 1,406.62