Finding the Fourth Proportional to 1,443,142.76, 1,989,907.20 and 1,079,400.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443,142.76 : 1,989,907.20 = 1,079,400.92 : x
2. Step 2: Convert to fraction form
   1,443,142.76/1,989,907.20 = 1,079,400.92/x
3. Step 3: Cross multiply
   1,443,142.76x = 1,989,907.20 × 1,079,400.92
4. Step 4: Simplify right side
   1,443,142.76x = 2,147,907,662,394.62
5. Step 5: Solve for x
   x = 2,147,907,662,394.62/1,443,142.76
6. Step 6: Final answer
   x = 1,488,354.25