Finding the Fourth Proportional to 2,667,128.16, 4,000,821.12 and 870,008.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,667,128.16 : 4,000,821.12 = 870,008.16 : x
2. Step 2: Convert to fraction form
   2,667,128.16/4,000,821.12 = 870,008.16/x
3. Step 3: Cross multiply
   2,667,128.16x = 4,000,821.12 × 870,008.16
4. Step 4: Simplify right side
   2,667,128.16x = 3,480,747,021,100.34
5. Step 5: Solve for x
   x = 3,480,747,021,100.34/2,667,128.16
6. Step 6: Final answer
   x = 1,305,054.28