Finding the Fourth Proportional to 415,918.72, 623,878.19 and 116,443.42

Step by Step Solution

1. Step 1: Write the proportion equation
   415,918.72 : 623,878.19 = 116,443.42 : x
2. Step 2: Convert to fraction form
   415,918.72/623,878.19 = 116,443.42/x
3. Step 3: Cross multiply
   415,918.72x = 623,878.19 × 116,443.42
4. Step 4: Simplify right side
   415,918.72x = 72,646,508,401.76
5. Step 5: Solve for x
   x = 72,646,508,401.76/415,918.72
6. Step 6: Final answer
   x = 174,665.16