Finding the Fourth Proportional to 148,022.60, 220,626.78 and 139,615.42

Step by Step Solution

1. Step 1: Write the proportion equation
   148,022.60 : 220,626.78 = 139,615.42 : x
2. Step 2: Convert to fraction form
   148,022.60/220,626.78 = 139,615.42/x
3. Step 3: Cross multiply
   148,022.60x = 220,626.78 × 139,615.42
4. Step 4: Simplify right side
   148,022.60x = 30,802,900,552.95
5. Step 5: Solve for x
   x = 30,802,900,552.95/148,022.60
6. Step 6: Final answer
   x = 208,095.93