Finding the Fourth Proportional to 1,139.72, 1,573.59 and 841.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,139.72 : 1,573.59 = 841.01 : x
2. Step 2: Convert to fraction form
   1,139.72/1,573.59 = 841.01/x
3. Step 3: Cross multiply
   1,139.72x = 1,573.59 × 841.01
4. Step 4: Simplify right side
   1,139.72x = 1,323,404.93
5. Step 5: Solve for x
   x = 1,323,404.93/1,139.72
6. Step 6: Final answer
   x = 1,161.17