Finding the Fourth Proportional to 1,991,090.30, 2,986,626.89 and 551,769.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,991,090.30 : 2,986,626.89 = 551,769.57 : x
2. Step 2: Convert to fraction form
   1,991,090.30/2,986,626.89 = 551,769.57/x
3. Step 3: Cross multiply
   1,991,090.30x = 2,986,626.89 × 551,769.57
4. Step 4: Simplify right side
   1,991,090.30x = 1,647,929,836,225.16
5. Step 5: Solve for x
   x = 1,647,929,836,225.16/1,991,090.30
6. Step 6: Final answer
   x = 827,651.99