Finding the Fourth Proportional to 664,019.10, 996,547.05 and 309,077.10

Step by Step Solution

1. Step 1: Write the proportion equation
   664,019.10 : 996,547.05 = 309,077.10 : x
2. Step 2: Convert to fraction form
   664,019.10/996,547.05 = 309,077.10/x
3. Step 3: Cross multiply
   664,019.10x = 996,547.05 × 309,077.10
4. Step 4: Simplify right side
   664,019.10x = 308,009,872,227.56
5. Step 5: Solve for x
   x = 308,009,872,227.56/664,019.10
6. Step 6: Final answer
   x = 463,856.95