Finding the Fourth Proportional to 1,443,921.61, 1,991,986.17 and 870,643.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443,921.61 : 1,991,986.17 = 870,643.30 : x
2. Step 2: Convert to fraction form
   1,443,921.61/1,991,986.17 = 870,643.30/x
3. Step 3: Cross multiply
   1,443,921.61x = 1,991,986.17 × 870,643.30
4. Step 4: Simplify right side
   1,443,921.61x = 1,734,309,402,643.23
5. Step 5: Solve for x
   x = 1,734,309,402,643.23/1,443,921.61
6. Step 6: Final answer
   x = 1,201,110.50