Finding the Fourth Proportional to 1,558,456.29, 2,150,648.78 and 870,138.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,558,456.29 : 2,150,648.78 = 870,138.72 : x
2. Step 2: Convert to fraction form
   1,558,456.29/2,150,648.78 = 870,138.72/x
3. Step 3: Cross multiply
   1,558,456.29x = 2,150,648.78 × 870,138.72
4. Step 4: Simplify right side
   1,558,456.29x = 1,871,362,772,248.07
5. Step 5: Solve for x
   x = 1,871,362,772,248.07/1,558,456.29
6. Step 6: Final answer
   x = 1,200,779.76