Finding the Fourth Proportional to 1,185,978.57, 1,777,105.12 and 916,766.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,185,978.57 : 1,777,105.12 = 916,766.36 : x
2. Step 2: Convert to fraction form
   1,185,978.57/1,777,105.12 = 916,766.36/x
3. Step 3: Cross multiply
   1,185,978.57x = 1,777,105.12 × 916,766.36
4. Step 4: Simplify right side
   1,185,978.57x = 1,629,190,192,199.76
5. Step 5: Solve for x
   x = 1,629,190,192,199.76/1,185,978.57
6. Step 6: Final answer
   x = 1,373,709.64