Finding the Fourth Proportional to 158,528.88, 238,089.60 and 139,560.30

Step by Step Solution

1. Step 1: Write the proportion equation
   158,528.88 : 238,089.60 = 139,560.30 : x
2. Step 2: Convert to fraction form
   158,528.88/238,089.60 = 139,560.30/x
3. Step 3: Cross multiply
   158,528.88x = 238,089.60 × 139,560.30
4. Step 4: Simplify right side
   158,528.88x = 33,227,856,002.88
5. Step 5: Solve for x
   x = 33,227,856,002.88/158,528.88
6. Step 6: Final answer
   x = 209,601.28