Finding the Fourth Proportional to 140,428.32, 210,456.18 and 61,456.56

Step by Step Solution

1. Step 1: Write the proportion equation
   140,428.32 : 210,456.18 = 61,456.56 : x
2. Step 2: Convert to fraction form
   140,428.32/210,456.18 = 61,456.56/x
3. Step 3: Cross multiply
   140,428.32x = 210,456.18 × 61,456.56
4. Step 4: Simplify right side
   140,428.32x = 12,933,912,853.54
5. Step 5: Solve for x
   x = 12,933,912,853.54/140,428.32
6. Step 6: Final answer
   x = 92,103.31