Finding the Fourth Proportional to 527,488.74, 727,919.31 and 309,693.78

Step by Step Solution

1. Step 1: Write the proportion equation
   527,488.74 : 727,919.31 = 309,693.78 : x
2. Step 2: Convert to fraction form
   527,488.74/727,919.31 = 309,693.78/x
3. Step 3: Cross multiply
   527,488.74x = 727,919.31 × 309,693.78
4. Step 4: Simplify right side
   527,488.74x = 225,432,082,648.89
5. Step 5: Solve for x
   x = 225,432,082,648.89/527,488.74
6. Step 6: Final answer
   x = 427,368.52