Finding the Fourth Proportional to 1,408,738.50, 2,113,439.47 and 1,121,636.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,408,738.50 : 2,113,439.47 = 1,121,636.03 : x
2. Step 2: Convert to fraction form
   1,408,738.50/2,113,439.47 = 1,121,636.03/x
3. Step 3: Cross multiply
   1,408,738.50x = 2,113,439.47 × 1,121,636.03
4. Step 4: Simplify right side
   1,408,738.50x = 2,370,509,843,404.82
5. Step 5: Solve for x
   x = 2,370,509,843,404.82/1,408,738.50
6. Step 6: Final answer
   x = 1,682,718.15