Finding the Fourth Proportional to 1,312.51, 1,811.27 and 723.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,312.51 : 1,811.27 = 723.06 : x
2. Step 2: Convert to fraction form
   1,312.51/1,811.27 = 723.06/x
3. Step 3: Cross multiply
   1,312.51x = 1,811.27 × 723.06
4. Step 4: Simplify right side
   1,312.51x = 1,309,656.89
5. Step 5: Solve for x
   x = 1,309,656.89/1,312.51
6. Step 6: Final answer
   x = 997.83