Finding the Fourth Proportional to 1,312.50, 1,811.34 and 723.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,312.50 : 1,811.34 = 723.04 : x
2. Step 2: Convert to fraction form
   1,312.50/1,811.34 = 723.04/x
3. Step 3: Cross multiply
   1,312.50x = 1,811.34 × 723.04
4. Step 4: Simplify right side
   1,312.50x = 1,309,667.26
5. Step 5: Solve for x
   x = 1,309,667.26/1,312.50
6. Step 6: Final answer
   x = 997.84