Finding the Fourth Proportional to 1,310.51, 1,808.50 and 713.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,310.51 : 1,808.50 = 713.00 : x
2. Step 2: Convert to fraction form
   1,310.51/1,808.50 = 713.00/x
3. Step 3: Cross multiply
   1,310.51x = 1,808.50 × 713.00
4. Step 4: Simplify right side
   1,310.51x = 1,289,447.89
5. Step 5: Solve for x
   x = 1,289,447.89/1,310.51
6. Step 6: Final answer
   x = 983.93