Finding the Fourth Proportional to 1,208,478.88, 1,811,474.16 and 647,362.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,208,478.88 : 1,811,474.16 = 647,362.72 : x
2. Step 2: Convert to fraction form
   1,208,478.88/1,811,474.16 = 647,362.72/x
3. Step 3: Cross multiply
   1,208,478.88x = 1,811,474.16 × 647,362.72
4. Step 4: Simplify right side
   1,208,478.88x = 1,172,680,839,427.32
5. Step 5: Solve for x
   x = 1,172,680,839,427.32/1,208,478.88
6. Step 6: Final answer
   x = 970,377.60