Finding the Fourth Proportional to 1,208,363.74, 1,667,506.71 and 664,498.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,208,363.74 : 1,667,506.71 = 664,498.96 : x
2. Step 2: Convert to fraction form
   1,208,363.74/1,667,506.71 = 664,498.96/x
3. Step 3: Cross multiply
   1,208,363.74x = 1,667,506.71 × 664,498.96
4. Step 4: Simplify right side
   1,208,363.74x = 1,108,056,474,588.02
5. Step 5: Solve for x
   x = 1,108,056,474,588.02/1,208,363.74
6. Step 6: Final answer
   x = 916,989.18