Finding the Fourth Proportional to 28,611, 42,919.47 and 7,834.50

Step by Step Solution

1. Step 1: Write the proportion equation
   28,611 : 42,919.47 = 7,834.50 : x
2. Step 2: Convert to fraction form
   28,611/42,919.47 = 7,834.50/x
3. Step 3: Cross multiply
   28,611x = 42,919.47 × 7,834.50
4. Step 4: Simplify right side
   28,611x = 336,252,587.72
5. Step 5: Solve for x
   x = 336,252,587.72/28,611
6. Step 6: Final answer
   x = 11,752.56