Finding the Fourth Proportional to 140,525.58, 210,788.73 and 57,419.58

Step by Step Solution

1. Step 1: Write the proportion equation
   140,525.58 : 210,788.73 = 57,419.58 : x
2. Step 2: Convert to fraction form
   140,525.58/210,788.73 = 57,419.58/x
3. Step 3: Cross multiply
   140,525.58x = 210,788.73 × 57,419.58
4. Step 4: Simplify right side
   140,525.58x = 12,103,400,345.33
5. Step 5: Solve for x
   x = 12,103,400,345.33/140,525.58
6. Step 6: Final answer
   x = 86,129.52