Finding the Fourth Proportional to 4,998.50, 7,498.12 and 1,920.50

Step by Step Solution

1. Step 1: Write the proportion equation
   4,998.50 : 7,498.12 = 1,920.50 : x
2. Step 2: Convert to fraction form
   4,998.50/7,498.12 = 1,920.50/x
3. Step 3: Cross multiply
   4,998.50x = 7,498.12 × 1,920.50
4. Step 4: Simplify right side
   4,998.50x = 14,400,139.46
5. Step 5: Solve for x
   x = 14,400,139.46/4,998.50
6. Step 6: Final answer
   x = 2,880.89