Finding the Fourth Proportional to 806,397.31, 1,112,828.39 and 438,875.83

Step by Step Solution

1. Step 1: Write the proportion equation
   806,397.31 : 1,112,828.39 = 438,875.83 : x
2. Step 2: Convert to fraction form
   806,397.31/1,112,828.39 = 438,875.83/x
3. Step 3: Cross multiply
   806,397.31x = 1,112,828.39 × 438,875.83
4. Step 4: Simplify right side
   806,397.31x = 488,393,483,308.81
5. Step 5: Solve for x
   x = 488,393,483,308.81/806,397.31
6. Step 6: Final answer
   x = 605,648.70