Finding the Fourth Proportional to 385,025.01, 578,040.53 and 309,164.06

Step by Step Solution

1. Step 1: Write the proportion equation
   385,025.01 : 578,040.53 = 309,164.06 : x
2. Step 2: Convert to fraction form
   385,025.01/578,040.53 = 309,164.06/x
3. Step 3: Cross multiply
   385,025.01x = 578,040.53 × 309,164.06
4. Step 4: Simplify right side
   385,025.01x = 178,709,352,663.33
5. Step 5: Solve for x
   x = 178,709,352,663.33/385,025.01
6. Step 6: Final answer
   x = 464,149.99