Finding the Fourth Proportional to 1,564.01, 2,158.32 and 901.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,564.01 : 2,158.32 = 901.07 : x
2. Step 2: Convert to fraction form
   1,564.01/2,158.32 = 901.07/x
3. Step 3: Cross multiply
   1,564.01x = 2,158.32 × 901.07
4. Step 4: Simplify right side
   1,564.01x = 1,944,786.61
5. Step 5: Solve for x
   x = 1,944,786.61/1,564.01
6. Step 6: Final answer
   x = 1,243.47