Finding the Fourth Proportional to 1,191,123.47, 1,643,749.16 and 647,257.97

Step by Step Solution

1. Step 1: Write the proportion equation
   1,191,123.47 : 1,643,749.16 = 647,257.97 : x
2. Step 2: Convert to fraction form
   1,191,123.47/1,643,749.16 = 647,257.97/x
3. Step 3: Cross multiply
   1,191,123.47x = 1,643,749.16 × 647,257.97
4. Step 4: Simplify right side
   1,191,123.47x = 1,063,929,745,363.89
5. Step 5: Solve for x
   x = 1,063,929,745,363.89/1,191,123.47
6. Step 6: Final answer
   x = 893,215.33