Finding the Fourth Proportional to 1,664,978.27, 2,297,423.78 and 976,390.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,664,978.27 : 2,297,423.78 = 976,390.39 : x
2. Step 2: Convert to fraction form
   1,664,978.27/2,297,423.78 = 976,390.39/x
3. Step 3: Cross multiply
   1,664,978.27x = 2,297,423.78 × 976,390.39
4. Step 4: Simplify right side
   1,664,978.27x = 2,243,182,484,180.40
5. Step 5: Solve for x
   x = 2,243,182,484,180.40/1,664,978.27
6. Step 6: Final answer
   x = 1,347,274.33