Finding the Fourth Proportional to 3,280,499.10, 4,911,891.30 and 3,280,499.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,280,499.10 : 4,911,891.30 = 3,280,499.10 : x
2. Step 2: Convert to fraction form
   3,280,499.10/4,911,891.30 = 3,280,499.10/x
3. Step 3: Cross multiply
   3,280,499.10x = 4,911,891.30 × 3,280,499.10
4. Step 4: Simplify right side
   3,280,499.10x = 16,113,454,988,947.83
5. Step 5: Solve for x
   x = 16,113,454,988,947.83/3,280,499.10
6. Step 6: Final answer
   x = 4,911,891.30