Finding the Fourth Proportional to 288,816.34, 432,863.25 and 139,016.56

Step by Step Solution

1. Step 1: Write the proportion equation
   288,816.34 : 432,863.25 = 139,016.56 : x
2. Step 2: Convert to fraction form
   288,816.34/432,863.25 = 139,016.56/x
3. Step 3: Cross multiply
   288,816.34x = 432,863.25 × 139,016.56
4. Step 4: Simplify right side
   288,816.34x = 60,175,159,965.42
5. Step 5: Solve for x
   x = 60,175,159,965.42/288,816.34
6. Step 6: Final answer
   x = 208,350.95