Finding the Fourth Proportional to 3,642,990.50, 5,464,748.20 and 1,399,128.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,642,990.50 : 5,464,748.20 = 1,399,128.50 : x
2. Step 2: Convert to fraction form
   3,642,990.50/5,464,748.20 = 1,399,128.50/x
3. Step 3: Cross multiply
   3,642,990.50x = 5,464,748.20 × 1,399,128.50
4. Step 4: Simplify right side
   3,642,990.50x = 7,645,884,951,943.70
5. Step 5: Solve for x
   x = 7,645,884,951,943.70/3,642,990.50
6. Step 6: Final answer
   x = 2,098,793.55