Finding the Fourth Proportional to 1,339,128.47, 1,848,291.53 and 880,285.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,339,128.47 : 1,848,291.53 = 880,285.43 : x
2. Step 2: Convert to fraction form
   1,339,128.47/1,848,291.53 = 880,285.43/x
3. Step 3: Cross multiply
   1,339,128.47x = 1,848,291.53 × 880,285.43
4. Step 4: Simplify right side
   1,339,128.47x = 1,627,024,090,608.52
5. Step 5: Solve for x
   x = 1,627,024,090,608.52/1,339,128.47
6. Step 6: Final answer
   x = 1,214,987.31