Finding the Fourth Proportional to 1,155,401.01, 1,594,423.58 and 639,141.44

Step by Step Solution

1. Step 1: Write the proportion equation
   1,155,401.01 : 1,594,423.58 = 639,141.44 : x
2. Step 2: Convert to fraction form
   1,155,401.01/1,594,423.58 = 639,141.44/x
3. Step 3: Cross multiply
   1,155,401.01x = 1,594,423.58 × 639,141.44
4. Step 4: Simplify right side
   1,155,401.01x = 1,019,062,171,723.33
5. Step 5: Solve for x
   x = 1,019,062,171,723.33/1,155,401.01
6. Step 6: Final answer
   x = 881,998.69