Finding the Fourth Proportional to 2,638,913.78, 3,641,685.81 and 1,431,663.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,638,913.78 : 3,641,685.81 = 1,431,663.86 : x
2. Step 2: Convert to fraction form
   2,638,913.78/3,641,685.81 = 1,431,663.86/x
3. Step 3: Cross multiply
   2,638,913.78x = 3,641,685.81 × 1,431,663.86
4. Step 4: Simplify right side
   2,638,913.78x = 5,213,669,963,651.83
5. Step 5: Solve for x
   x = 5,213,669,963,651.83/2,638,913.78
6. Step 6: Final answer
   x = 1,975,687.88