Finding the Fourth Proportional to 142,759.31, 214,141.40 and 54,054.59

Step by Step Solution

1. Step 1: Write the proportion equation
   142,759.31 : 214,141.40 = 54,054.59 : x
2. Step 2: Convert to fraction form
   142,759.31/214,141.40 = 54,054.59/x
3. Step 3: Cross multiply
   142,759.31x = 214,141.40 × 54,054.59
4. Step 4: Simplify right side
   142,759.31x = 11,575,325,493.27
5. Step 5: Solve for x
   x = 11,575,325,493.27/142,759.31
6. Step 6: Final answer
   x = 81,082.81