Finding the Fourth Proportional to 1,205,131.83, 1,663,026.27 and 661,254.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,205,131.83 : 1,663,026.27 = 661,254.09 : x
2. Step 2: Convert to fraction form
   1,205,131.83/1,663,026.27 = 661,254.09/x
3. Step 3: Cross multiply
   1,205,131.83x = 1,663,026.27 × 661,254.09
4. Step 4: Simplify right side
   1,205,131.83x = 1,099,682,922,814.94
5. Step 5: Solve for x
   x = 1,099,682,922,814.94/1,205,131.83
6. Step 6: Final answer
   x = 912,500.11