Finding the Fourth Proportional to 1,564.88, 2,159.63 and 901.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,564.88 : 2,159.63 = 901.72 : x
2. Step 2: Convert to fraction form
   1,564.88/2,159.63 = 901.72/x
3. Step 3: Cross multiply
   1,564.88x = 2,159.63 × 901.72
4. Step 4: Simplify right side
   1,564.88x = 1,947,381.56
5. Step 5: Solve for x
   x = 1,947,381.56/1,564.88
6. Step 6: Final answer
   x = 1,244.43