Finding the Fourth Proportional to 619,667.47, 929,481.76 and 340,936.75

Step by Step Solution

1. Step 1: Write the proportion equation
   619,667.47 : 929,481.76 = 340,936.75 : x
2. Step 2: Convert to fraction form
   619,667.47/929,481.76 = 340,936.75/x
3. Step 3: Cross multiply
   619,667.47x = 929,481.76 × 340,936.75
4. Step 4: Simplify right side
   619,667.47x = 316,894,488,541.15
5. Step 5: Solve for x
   x = 316,894,488,541.15/619,667.47
6. Step 6: Final answer
   x = 511,394.43