Finding the Fourth Proportional to 1,108.71, 1,530.01 and 611.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,108.71 : 1,530.01 = 611.37 : x
2. Step 2: Convert to fraction form
   1,108.71/1,530.01 = 611.37/x
3. Step 3: Cross multiply
   1,108.71x = 1,530.01 × 611.37
4. Step 4: Simplify right side
   1,108.71x = 935,402.98
5. Step 5: Solve for x
   x = 935,402.98/1,108.71
6. Step 6: Final answer
   x = 843.69