Finding the Fourth Proportional to 2,105,262.72, 2,905,292.43 and 1,289,168.64

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105,262.72 : 2,905,292.43 = 1,289,168.64 : x
2. Step 2: Convert to fraction form
   2,105,262.72/2,905,292.43 = 1,289,168.64/x
3. Step 3: Cross multiply
   2,105,262.72x = 2,905,292.43 × 1,289,168.64
4. Step 4: Simplify right side
   2,105,262.72x = 3,745,411,890,785.40
5. Step 5: Solve for x
   x = 3,745,411,890,785.40/2,105,262.72
6. Step 6: Final answer
   x = 1,779,071.02