Finding the Fourth Proportional to 1,423.44, 2,131.59 and 901.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,423.44 : 2,131.59 = 901.86 : x
2. Step 2: Convert to fraction form
   1,423.44/2,131.59 = 901.86/x
3. Step 3: Cross multiply
   1,423.44x = 2,131.59 × 901.86
4. Step 4: Simplify right side
   1,423.44x = 1,922,395.76
5. Step 5: Solve for x
   x = 1,922,395.76/1,423.44
6. Step 6: Final answer
   x = 1,350.53