Finding the Fourth Proportional to 140,031.25, 209,858.55 and 76,756.48

Step by Step Solution

1. Step 1: Write the proportion equation
   140,031.25 : 209,858.55 = 76,756.48 : x
2. Step 2: Convert to fraction form
   140,031.25/209,858.55 = 76,756.48/x
3. Step 3: Cross multiply
   140,031.25x = 209,858.55 × 76,756.48
4. Step 4: Simplify right side
   140,031.25x = 16,108,002,783.42
5. Step 5: Solve for x
   x = 16,108,002,783.42/140,031.25
6. Step 6: Final answer
   x = 115,031.49