Finding the Fourth Proportional to 2,152.24, 2,970.07 and 1,312.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,152.24 : 2,970.07 = 1,312.89 : x
2. Step 2: Convert to fraction form
   2,152.24/2,970.07 = 1,312.89/x
3. Step 3: Cross multiply
   2,152.24x = 2,970.07 × 1,312.89
4. Step 4: Simplify right side
   2,152.24x = 3,899,360.78
5. Step 5: Solve for x
   x = 3,899,360.78/2,152.24
6. Step 6: Final answer
   x = 1,811.77