Finding the Fourth Proportional to 1,021,067.32, 1,409,048.22 and 639,304.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,021,067.32 : 1,409,048.22 = 639,304.60 : x
2. Step 2: Convert to fraction form
   1,021,067.32/1,409,048.22 = 639,304.60/x
3. Step 3: Cross multiply
   1,021,067.32x = 1,409,048.22 × 639,304.60
4. Step 4: Simplify right side
   1,021,067.32x = 900,811,008,667.81
5. Step 5: Solve for x
   x = 900,811,008,667.81/1,021,067.32
6. Step 6: Final answer
   x = 882,224.89