Finding the Fourth Proportional to 288,870.14, 433,042.76 and 131,012.48

Step by Step Solution

1. Step 1: Write the proportion equation
   288,870.14 : 433,042.76 = 131,012.48 : x
2. Step 2: Convert to fraction form
   288,870.14/433,042.76 = 131,012.48/x
3. Step 3: Cross multiply
   288,870.14x = 433,042.76 × 131,012.48
4. Step 4: Simplify right side
   288,870.14x = 56,734,005,933.64
5. Step 5: Solve for x
   x = 56,734,005,933.64/288,870.14
6. Step 6: Final answer
   x = 196,399.69