Finding the Fourth Proportional to 1,248,706, 1,872,300.52 and 489,638.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,248,706 : 1,872,300.52 = 489,638.05 : x
2. Step 2: Convert to fraction form
   1,248,706/1,872,300.52 = 489,638.05/x
3. Step 3: Cross multiply
   1,248,706x = 1,872,300.52 × 489,638.05
4. Step 4: Simplify right side
   1,248,706x = 916,749,575,626.79
5. Step 5: Solve for x
   x = 916,749,575,626.79/1,248,706
6. Step 6: Final answer
   x = 734,159.66