Finding the Fourth Proportional to 1,126,579.93, 1,554,742.56 and 643,300.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,126,579.93 : 1,554,742.56 = 643,300.33 : x
2. Step 2: Convert to fraction form
   1,126,579.93/1,554,742.56 = 643,300.33/x
3. Step 3: Cross multiply
   1,126,579.93x = 1,554,742.56 × 643,300.33
4. Step 4: Simplify right side
   1,126,579.93x = 1,000,166,401,913.04
5. Step 5: Solve for x
   x = 1,000,166,401,913.04/1,126,579.93
6. Step 6: Final answer
   x = 887,790.01