Finding the Fourth Proportional to 142,870.46, 214,261.92 and 98,780.54

Step by Step Solution

1. Step 1: Write the proportion equation
   142,870.46 : 214,261.92 = 98,780.54 : x
2. Step 2: Convert to fraction form
   142,870.46/214,261.92 = 98,780.54/x
3. Step 3: Cross multiply
   142,870.46x = 214,261.92 × 98,780.54
4. Step 4: Simplify right side
   142,870.46x = 21,164,907,087.73
5. Step 5: Solve for x
   x = 21,164,907,087.73/142,870.46
6. Step 6: Final answer
   x = 148,140.55