Finding the Fourth Proportional to 1,155,405.01, 1,594,429.08 and 639,145.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,155,405.01 : 1,594,429.08 = 639,145.45 : x
2. Step 2: Convert to fraction form
   1,155,405.01/1,594,429.08 = 639,145.45/x
3. Step 3: Cross multiply
   1,155,405.01x = 1,594,429.08 × 639,145.45
4. Step 4: Simplify right side
   1,155,405.01x = 1,019,072,091,829.69
5. Step 5: Solve for x
   x = 1,019,072,091,829.69/1,155,405.01
6. Step 6: Final answer
   x = 882,004.22