Finding the Fourth Proportional to 1,276.07, 1,762.71 and 999.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,276.07 : 1,762.71 = 999.83 : x
2. Step 2: Convert to fraction form
   1,276.07/1,762.71 = 999.83/x
3. Step 3: Cross multiply
   1,276.07x = 1,762.71 × 999.83
4. Step 4: Simplify right side
   1,276.07x = 1,762,410.34
5. Step 5: Solve for x
   x = 1,762,410.34/1,276.07
6. Step 6: Final answer
   x = 1,381.12