Finding the Fourth Proportional to 142,638.05, 213,959.50 and 53,933.33

Step by Step Solution

1. Step 1: Write the proportion equation
   142,638.05 : 213,959.50 = 53,933.33 : x
2. Step 2: Convert to fraction form
   142,638.05/213,959.50 = 53,933.33/x
3. Step 3: Cross multiply
   142,638.05x = 213,959.50 × 53,933.33
4. Step 4: Simplify right side
   142,638.05x = 11,539,547,250.34
5. Step 5: Solve for x
   x = 11,539,547,250.34/142,638.05
6. Step 6: Final answer
   x = 80,900.91