Finding the Fourth Proportional to 1,122.50, 1,543.83 and 901.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,122.50 : 1,543.83 = 901.10 : x
2. Step 2: Convert to fraction form
   1,122.50/1,543.83 = 901.10/x
3. Step 3: Cross multiply
   1,122.50x = 1,543.83 × 901.10
4. Step 4: Simplify right side
   1,122.50x = 1,391,145.21
5. Step 5: Solve for x
   x = 1,391,145.21/1,122.50
6. Step 6: Final answer
   x = 1,239.33