Finding the Fourth Proportional to 2,309,034.40, 3,186,565.88 and 1,290,439.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,309,034.40 : 3,186,565.88 = 1,290,439.12 : x
2. Step 2: Convert to fraction form
   2,309,034.40/3,186,565.88 = 1,290,439.12/x
3. Step 3: Cross multiply
   2,309,034.40x = 3,186,565.88 × 1,290,439.12
4. Step 4: Simplify right side
   2,309,034.40x = 4,112,069,270,009.23
5. Step 5: Solve for x
   x = 4,112,069,270,009.23/2,309,034.40
6. Step 6: Final answer
   x = 1,780,860.98