Finding the Fourth Proportional to 945,111.60, 1,304,230.32 and 515,400

Step by Step Solution

1. Step 1: Write the proportion equation
   945,111.60 : 1,304,230.32 = 515,400 : x
2. Step 2: Convert to fraction form
   945,111.60/1,304,230.32 = 515,400/x
3. Step 3: Cross multiply
   945,111.60x = 1,304,230.32 × 515,400
4. Step 4: Simplify right side
   945,111.60x = 672,200,306,928
5. Step 5: Solve for x
   x = 672,200,306,928/945,111.60
6. Step 6: Final answer
   x = 711,239.08