Finding the Fourth Proportional to 219,615.50, 303,101.90 and 139,050.52

Step by Step Solution

1. Step 1: Write the proportion equation
   219,615.50 : 303,101.90 = 139,050.52 : x
2. Step 2: Convert to fraction form
   219,615.50/303,101.90 = 139,050.52/x
3. Step 3: Cross multiply
   219,615.50x = 303,101.90 × 139,050.52
4. Step 4: Simplify right side
   219,615.50x = 42,146,477,581.37
5. Step 5: Solve for x
   x = 42,146,477,581.37/219,615.50
6. Step 6: Final answer
   x = 191,910.30