Finding the Fourth Proportional to 1,310.01, 1,807.81 and 712.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,310.01 : 1,807.81 = 712.50 : x
2. Step 2: Convert to fraction form
   1,310.01/1,807.81 = 712.50/x
3. Step 3: Cross multiply
   1,310.01x = 1,807.81 × 712.50
4. Step 4: Simplify right side
   1,310.01x = 1,288,056.06
5. Step 5: Solve for x
   x = 1,288,056.06/1,310.01
6. Step 6: Final answer
   x = 983.24