Finding the Fourth Proportional to 2,111,200.20, 2,913,846.30 and 1,205,782.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111,200.20 : 2,913,846.30 = 1,205,782.20 : x
2. Step 2: Convert to fraction form
   2,111,200.20/2,913,846.30 = 1,205,782.20/x
3. Step 3: Cross multiply
   2,111,200.20x = 2,913,846.30 × 1,205,782.20
4. Step 4: Simplify right side
   2,111,200.20x = 3,513,464,002,075.86
5. Step 5: Solve for x
   x = 3,513,464,002,075.86/2,111,200.20
6. Step 6: Final answer
   x = 1,664,202.19