Finding the Fourth Proportional to 1,121.86, 1,681.72 and 601.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,121.86 : 1,681.72 = 601.53 : x
2. Step 2: Convert to fraction form
   1,121.86/1,681.72 = 601.53/x
3. Step 3: Cross multiply
   1,121.86x = 1,681.72 × 601.53
4. Step 4: Simplify right side
   1,121.86x = 1,011,605.03
5. Step 5: Solve for x
   x = 1,011,605.03/1,121.86
6. Step 6: Final answer
   x = 901.72