Finding the Fourth Proportional to 948,638.97, 1,309,104.59 and 518,915.34

Step by Step Solution

1. Step 1: Write the proportion equation
   948,638.97 : 1,309,104.59 = 518,915.34 : x
2. Step 2: Convert to fraction form
   948,638.97/1,309,104.59 = 518,915.34/x
3. Step 3: Cross multiply
   948,638.97x = 1,309,104.59 × 518,915.34
4. Step 4: Simplify right side
   948,638.97x = 679,314,450,820.83
5. Step 5: Solve for x
   x = 679,314,450,820.83/948,638.97
6. Step 6: Final answer
   x = 716,093.76