Finding the Fourth Proportional to 1,312.34, 1,810.98 and 722.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,312.34 : 1,810.98 = 722.86 : x
2. Step 2: Convert to fraction form
   1,312.34/1,810.98 = 722.86/x
3. Step 3: Cross multiply
   1,312.34x = 1,810.98 × 722.86
4. Step 4: Simplify right side
   1,312.34x = 1,309,080.48
5. Step 5: Solve for x
   x = 1,309,080.48/1,312.34
6. Step 6: Final answer
   x = 997.52