Finding the Fourth Proportional to 140,019.40, 210,042.18 and 55,759.25

Step by Step Solution

1. Step 1: Write the proportion equation
   140,019.40 : 210,042.18 = 55,759.25 : x
2. Step 2: Convert to fraction form
   140,019.40/210,042.18 = 55,759.25/x
3. Step 3: Cross multiply
   140,019.40x = 210,042.18 × 55,759.25
4. Step 4: Simplify right side
   140,019.40x = 11,711,794,425.17
5. Step 5: Solve for x
   x = 11,711,794,425.17/140,019.40
6. Step 6: Final answer
   x = 83,644.08