Finding the Fourth Proportional to 1,185,978.78, 1,777,105.44 and 916,766.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,185,978.78 : 1,777,105.44 = 916,766.59 : x
2. Step 2: Convert to fraction form
   1,185,978.78/1,777,105.44 = 916,766.59/x
3. Step 3: Cross multiply
   1,185,978.78x = 1,777,105.44 × 916,766.59
4. Step 4: Simplify right side
   1,185,978.78x = 1,629,190,894,299.25
5. Step 5: Solve for x
   x = 1,629,190,894,299.25/1,185,978.78
6. Step 6: Final answer
   x = 1,373,709.99