Finding the Fourth Proportional to 1,573.98, 2,172.15 and 901.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,573.98 : 2,172.15 = 901.98 : x
2. Step 2: Convert to fraction form
   1,573.98/2,172.15 = 901.98/x
3. Step 3: Cross multiply
   1,573.98x = 2,172.15 × 901.98
4. Step 4: Simplify right side
   1,573.98x = 1,959,235.86
5. Step 5: Solve for x
   x = 1,959,235.86/1,573.98
6. Step 6: Final answer
   x = 1,244.77