Finding the Fourth Proportional to 1,272,978.27, 1,756,280.03 and 721,634.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,272,978.27 : 1,756,280.03 = 721,634.83 : x
2. Step 2: Convert to fraction form
   1,272,978.27/1,756,280.03 = 721,634.83/x
3. Step 3: Cross multiply
   1,272,978.27x = 1,756,280.03 × 721,634.83
4. Step 4: Simplify right side
   1,272,978.27x = 1,267,392,840,881.44
5. Step 5: Solve for x
   x = 1,267,392,840,881.44/1,272,978.27
6. Step 6: Final answer
   x = 995,612.31