Finding the Fourth Proportional to 142,322.50, 213,504.60 and 58,087.78

Step by Step Solution

1. Step 1: Write the proportion equation
   142,322.50 : 213,504.60 = 58,087.78 : x
2. Step 2: Convert to fraction form
   142,322.50/213,504.60 = 58,087.78/x
3. Step 3: Cross multiply
   142,322.50x = 213,504.60 × 58,087.78
4. Step 4: Simplify right side
   142,322.50x = 12,402,008,233.79
5. Step 5: Solve for x
   x = 12,402,008,233.79/142,322.50
6. Step 6: Final answer
   x = 87,140.18