Finding the Fourth Proportional to 12,700.94, 17,535.86 and 7,928.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,700.94 : 17,535.86 = 7,928.15 : x
2. Step 2: Convert to fraction form
   12,700.94/17,535.86 = 7,928.15/x
3. Step 3: Cross multiply
   12,700.94x = 17,535.86 × 7,928.15
4. Step 4: Simplify right side
   12,700.94x = 139,026,866.90
5. Step 5: Solve for x
   x = 139,026,866.90/12,700.94
6. Step 6: Final answer
   x = 10,946.19