Finding the Fourth Proportional to 1,155,406.01, 1,594,430.46 and 639,146.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,155,406.01 : 1,594,430.46 = 639,146.45 : x
2. Step 2: Convert to fraction form
   1,155,406.01/1,594,430.46 = 639,146.45/x
3. Step 3: Cross multiply
   1,155,406.01x = 1,594,430.46 × 639,146.45
4. Step 4: Simplify right side
   1,155,406.01x = 1,019,074,568,280.87
5. Step 5: Solve for x
   x = 1,019,074,568,280.87/1,155,406.01
6. Step 6: Final answer
   x = 882,005.60