Finding the Fourth Proportional to 142,870.56, 214,290.78 and 58,639.60

Step by Step Solution

1. Step 1: Write the proportion equation
   142,870.56 : 214,290.78 = 58,639.60 : x
2. Step 2: Convert to fraction form
   142,870.56/214,290.78 = 58,639.60/x
3. Step 3: Cross multiply
   142,870.56x = 214,290.78 × 58,639.60
4. Step 4: Simplify right side
   142,870.56x = 12,565,925,622.89
5. Step 5: Solve for x
   x = 12,565,925,622.89/142,870.56
6. Step 6: Final answer
   x = 87,953.22