Finding the Fourth Proportional to 1,387,019.01, 1,913,545.56 and 870,471.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,387,019.01 : 1,913,545.56 = 870,471.48 : x
2. Step 2: Convert to fraction form
   1,387,019.01/1,913,545.56 = 870,471.48/x
3. Step 3: Cross multiply
   1,387,019.01x = 1,913,545.56 × 870,471.48
4. Step 4: Simplify right side
   1,387,019.01x = 1,665,686,835,660.63
5. Step 5: Solve for x
   x = 1,665,686,835,660.63/1,387,019.01
6. Step 6: Final answer
   x = 1,200,911.32