Finding the Fourth Proportional to 12,931.50, 17,845.86 and 7,630.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,931.50 : 17,845.86 = 7,630.86 : x
2. Step 2: Convert to fraction form
   12,931.50/17,845.86 = 7,630.86/x
3. Step 3: Cross multiply
   12,931.50x = 17,845.86 × 7,630.86
4. Step 4: Simplify right side
   12,931.50x = 136,179,259.24
5. Step 5: Solve for x
   x = 136,179,259.24/12,931.50
6. Step 6: Final answer
   x = 10,530.82