Finding the Fourth Proportional to 666,948.34, 920,388.72 and 365,142.34

Step by Step Solution

1. Step 1: Write the proportion equation
   666,948.34 : 920,388.72 = 365,142.34 : x
2. Step 2: Convert to fraction form
   666,948.34/920,388.72 = 365,142.34/x
3. Step 3: Cross multiply
   666,948.34x = 920,388.72 × 365,142.34
4. Step 4: Simplify right side
   666,948.34x = 336,072,890,930.41
5. Step 5: Solve for x
   x = 336,072,890,930.41/666,948.34
6. Step 6: Final answer
   x = 503,896.44