Finding the Fourth Proportional to 1,131.51, 1,561.05 and 738.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.51 : 1,561.05 = 738.39 : x
2. Step 2: Convert to fraction form
   1,131.51/1,561.05 = 738.39/x
3. Step 3: Cross multiply
   1,131.51x = 1,561.05 × 738.39
4. Step 4: Simplify right side
   1,131.51x = 1,152,663.71
5. Step 5: Solve for x
   x = 1,152,663.71/1,131.51
6. Step 6: Final answer
   x = 1,018.70