Finding the Fourth Proportional to 1,381.72, 1,906.80 and 752.26

Step by Step Solution

1. Step 1: Write the proportion equation
   1,381.72 : 1,906.80 = 752.26 : x
2. Step 2: Convert to fraction form
   1,381.72/1,906.80 = 752.26/x
3. Step 3: Cross multiply
   1,381.72x = 1,906.80 × 752.26
4. Step 4: Simplify right side
   1,381.72x = 1,434,409.37
5. Step 5: Solve for x
   x = 1,434,409.37/1,381.72
6. Step 6: Final answer
   x = 1,038.13