Finding the Fourth Proportional to 1,118,062.78, 1,674,978.23 and 661,285.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,118,062.78 : 1,674,978.23 = 661,285.96 : x
2. Step 2: Convert to fraction form
   1,118,062.78/1,674,978.23 = 661,285.96/x
3. Step 3: Cross multiply
   1,118,062.78x = 1,674,978.23 × 661,285.96
4. Step 4: Simplify right side
   1,118,062.78x = 1,107,639,584,270.42
5. Step 5: Solve for x
   x = 1,107,639,584,270.42/1,118,062.78
6. Step 6: Final answer
   x = 990,677.45