Finding the Fourth Proportional to 1,368.72, 1,888.92 and 747.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,368.72 : 1,888.92 = 747.72 : x
2. Step 2: Convert to fraction form
   1,368.72/1,888.92 = 747.72/x
3. Step 3: Cross multiply
   1,368.72x = 1,888.92 × 747.72
4. Step 4: Simplify right side
   1,368.72x = 1,412,383.26
5. Step 5: Solve for x
   x = 1,412,383.26/1,368.72
6. Step 6: Final answer
   x = 1,031.90