Finding the Fourth Proportional to 12,782.18, 19,175.69 and 4,990.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,782.18 : 19,175.69 = 4,990.50 : x
2. Step 2: Convert to fraction form
   12,782.18/19,175.69 = 4,990.50/x
3. Step 3: Cross multiply
   12,782.18x = 19,175.69 × 4,990.50
4. Step 4: Simplify right side
   12,782.18x = 95,696,280.95
5. Step 5: Solve for x
   x = 95,696,280.95/12,782.18
6. Step 6: Final answer
   x = 7,486.69