Finding the Fourth Proportional to 948,910.80, 1,309,496.04 and 519,192.72

Step by Step Solution

1. Step 1: Write the proportion equation
   948,910.80 : 1,309,496.04 = 519,192.72 : x
2. Step 2: Convert to fraction form
   948,910.80/1,309,496.04 = 519,192.72/x
3. Step 3: Cross multiply
   948,910.80x = 1,309,496.04 × 519,192.72
4. Step 4: Simplify right side
   948,910.80x = 679,880,810,836.83
5. Step 5: Solve for x
   x = 679,880,810,836.83/948,910.80
6. Step 6: Final answer
   x = 716,485.48