Finding the Fourth Proportional to 808,068, 1,212,276.96 and 309,432

Step by Step Solution

1. Step 1: Write the proportion equation
   808,068 : 1,212,276.96 = 309,432 : x
2. Step 2: Convert to fraction form
   808,068/1,212,276.96 = 309,432/x
3. Step 3: Cross multiply
   808,068x = 1,212,276.96 × 309,432
4. Step 4: Simplify right side
   808,068x = 375,117,284,286.72
5. Step 5: Solve for x
   x = 375,117,284,286.72/808,068
6. Step 6: Final answer
   x = 464,215.00