Finding the Fourth Proportional to 219,123, 328,463.06 and 85,951.10

Step by Step Solution

1. Step 1: Write the proportion equation
   219,123 : 328,463.06 = 85,951.10 : x
2. Step 2: Convert to fraction form
   219,123/328,463.06 = 85,951.10/x
3. Step 3: Cross multiply
   219,123x = 328,463.06 × 85,951.10
4. Step 4: Simplify right side
   219,123x = 28,231,761,316.37
5. Step 5: Solve for x
   x = 28,231,761,316.37/219,123
6. Step 6: Final answer
   x = 128,839.79