Finding the Fourth Proportional to 1,557,643.89, 2,149,365.20 and 904,119.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,557,643.89 : 2,149,365.20 = 904,119.15 : x
2. Step 2: Convert to fraction form
   1,557,643.89/2,149,365.20 = 904,119.15/x
3. Step 3: Cross multiply
   1,557,643.89x = 2,149,365.20 × 904,119.15
4. Step 4: Simplify right side
   1,557,643.89x = 1,943,282,233,142.98
5. Step 5: Solve for x
   x = 1,943,282,233,142.98/1,557,643.89
6. Step 6: Final answer
   x = 1,247,577.99