Finding the Fourth Proportional to 2,106,238.30, 2,906,622.99 and 1,290,443.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,106,238.30 : 2,906,622.99 = 1,290,443.50 : x
2. Step 2: Convert to fraction form
   2,106,238.30/2,906,622.99 = 1,290,443.50/x
3. Step 3: Cross multiply
   2,106,238.30x = 2,906,622.99 × 1,290,443.50
4. Step 4: Simplify right side
   2,106,238.30x = 3,750,832,744,396.07
5. Step 5: Solve for x
   x = 3,750,832,744,396.07/2,106,238.30
6. Step 6: Final answer
   x = 1,780,820.69