Finding the Fourth Proportional to 1,208,695.08, 1,667,963.98 and 664,830.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,208,695.08 : 1,667,963.98 = 664,830.71 : x
2. Step 2: Convert to fraction form
   1,208,695.08/1,667,963.98 = 664,830.71/x
3. Step 3: Cross multiply
   1,208,695.08x = 1,667,963.98 × 664,830.71
4. Step 4: Simplify right side
   1,208,695.08x = 1,108,913,677,077.83
5. Step 5: Solve for x
   x = 1,108,913,677,077.83/1,208,695.08
6. Step 6: Final answer
   x = 917,447.00