Finding the Fourth Proportional to 1,915,728.47, 2,876,846.63 and 1,280,116.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,915,728.47 : 2,876,846.63 = 1,280,116.10 : x
2. Step 2: Convert to fraction form
   1,915,728.47/2,876,846.63 = 1,280,116.10/x
3. Step 3: Cross multiply
   1,915,728.47x = 2,876,846.63 × 1,280,116.10
4. Step 4: Simplify right side
   1,915,728.47x = 3,682,697,689,085.28
5. Step 5: Solve for x
   x = 3,682,697,689,085.28/1,915,728.47
6. Step 6: Final answer
   x = 1,922,348.47