Finding the Fourth Proportional to 666,719, 920,072.22 and 364,913

Step by Step Solution

1. Step 1: Write the proportion equation
   666,719 : 920,072.22 = 364,913 : x
2. Step 2: Convert to fraction form
   666,719/920,072.22 = 364,913/x
3. Step 3: Cross multiply
   666,719x = 920,072.22 × 364,913
4. Step 4: Simplify right side
   666,719x = 335,746,314,016.86
5. Step 5: Solve for x
   x = 335,746,314,016.86/666,719
6. Step 6: Final answer
   x = 503,579.94