Finding the Fourth Proportional to 666,907, 920,331.72 and 365,101

Step by Step Solution

1. Step 1: Write the proportion equation
   666,907 : 920,331.72 = 365,101 : x
2. Step 2: Convert to fraction form
   666,907/920,331.72 = 365,101/x
3. Step 3: Cross multiply
   666,907x = 920,331.72 × 365,101
4. Step 4: Simplify right side
   666,907x = 336,014,031,303.72
5. Step 5: Solve for x
   x = 336,014,031,303.72/666,907
6. Step 6: Final answer
   x = 503,839.41