Finding the Fourth Proportional to 691,012.69, 953,584.61 and 385,082.38

Step by Step Solution

1. Step 1: Write the proportion equation
   691,012.69 : 953,584.61 = 385,082.38 : x
2. Step 2: Convert to fraction form
   691,012.69/953,584.61 = 385,082.38/x
3. Step 3: Cross multiply
   691,012.69x = 953,584.61 × 385,082.38
4. Step 4: Simplify right side
   691,012.69x = 367,208,631,150.17
5. Step 5: Solve for x
   x = 367,208,631,150.17/691,012.69
6. Step 6: Final answer
   x = 531,406.49