Finding the Fourth Proportional to 12,868.58, 17,752.98 and 7,830.92

Step by Step Solution

1. Step 1: Write the proportion equation
   12,868.58 : 17,752.98 = 7,830.92 : x
2. Step 2: Convert to fraction form
   12,868.58/17,752.98 = 7,830.92/x
3. Step 3: Cross multiply
   12,868.58x = 17,752.98 × 7,830.92
4. Step 4: Simplify right side
   12,868.58x = 139,022,166.14
5. Step 5: Solve for x
   x = 139,022,166.14/12,868.58
6. Step 6: Final answer
   x = 10,803.23