Finding the Fourth Proportional to 89,328.84, 123,234.30 and 55,328.28

Step by Step Solution

1. Step 1: Write the proportion equation
   89,328.84 : 123,234.30 = 55,328.28 : x
2. Step 2: Convert to fraction form
   89,328.84/123,234.30 = 55,328.28/x
3. Step 3: Cross multiply
   89,328.84x = 123,234.30 × 55,328.28
4. Step 4: Simplify right side
   89,328.84x = 6,818,341,856.00
5. Step 5: Solve for x
   x = 6,818,341,856.00/89,328.84
6. Step 6: Final answer
   x = 76,328.56