Finding the Fourth Proportional to 2,231,859.60, 3,079,929.96 and 1,213,290

Step by Step Solution

1. Step 1: Write the proportion equation
   2,231,859.60 : 3,079,929.96 = 1,213,290 : x
2. Step 2: Convert to fraction form
   2,231,859.60/3,079,929.96 = 1,213,290/x
3. Step 3: Cross multiply
   2,231,859.60x = 3,079,929.96 × 1,213,290
4. Step 4: Simplify right side
   2,231,859.60x = 3,736,848,221,168.40
5. Step 5: Solve for x
   x = 3,736,848,221,168.40/2,231,859.60
6. Step 6: Final answer
   x = 1,674,320.47