Finding the Fourth Proportional to 1,128,105.90, 1,692,675.59 and 488,605.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,128,105.90 : 1,692,675.59 = 488,605.23 : x
2. Step 2: Convert to fraction form
   1,128,105.90/1,692,675.59 = 488,605.23/x
3. Step 3: Cross multiply
   1,128,105.90x = 1,692,675.59 × 488,605.23
4. Step 4: Simplify right side
   1,128,105.90x = 827,050,143,524.31
5. Step 5: Solve for x
   x = 827,050,143,524.31/1,128,105.90
6. Step 6: Final answer
   x = 733,131.65