Finding the Fourth Proportional to 1,729.10, 2,591.94 and 1,312.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,729.10 : 2,591.94 = 1,312.76 : x
2. Step 2: Convert to fraction form
   1,729.10/2,591.94 = 1,312.76/x
3. Step 3: Cross multiply
   1,729.10x = 2,591.94 × 1,312.76
4. Step 4: Simplify right side
   1,729.10x = 3,402,595.15
5. Step 5: Solve for x
   x = 3,402,595.15/1,729.10
6. Step 6: Final answer
   x = 1,967.84