Finding the Fourth Proportional to 2,309,029.40, 3,186,558.98 and 1,290,434.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,309,029.40 : 3,186,558.98 = 1,290,434.12 : x
2. Step 2: Convert to fraction form
   2,309,029.40/3,186,558.98 = 1,290,434.12/x
3. Step 3: Cross multiply
   2,309,029.40x = 3,186,558.98 × 1,290,434.12
4. Step 4: Simplify right side
   2,309,029.40x = 4,112,044,433,184.40
5. Step 5: Solve for x
   x = 4,112,044,433,184.40/2,309,029.40
6. Step 6: Final answer
   x = 1,780,854.08