Finding the Fourth Proportional to 14,139.83, 19,513.12 and 7,766.57

Step by Step Solution

1. Step 1: Write the proportion equation
   14,139.83 : 19,513.12 = 7,766.57 : x
2. Step 2: Convert to fraction form
   14,139.83/19,513.12 = 7,766.57/x
3. Step 3: Cross multiply
   14,139.83x = 19,513.12 × 7,766.57
4. Step 4: Simplify right side
   14,139.83x = 151,549,953.85
5. Step 5: Solve for x
   x = 151,549,953.85/14,139.83
6. Step 6: Final answer
   x = 10,717.95