Finding the Fourth Proportional to 142,781.82, 214,199.76 and 57,399.29

Step by Step Solution

1. Step 1: Write the proportion equation
   142,781.82 : 214,199.76 = 57,399.29 : x
2. Step 2: Convert to fraction form
   142,781.82/214,199.76 = 57,399.29/x
3. Step 3: Cross multiply
   142,781.82x = 214,199.76 × 57,399.29
4. Step 4: Simplify right side
   142,781.82x = 12,294,913,071.17
5. Step 5: Solve for x
   x = 12,294,913,071.17/142,781.82
6. Step 6: Final answer
   x = 86,109.79