Finding the Fourth Proportional to 9,385.01, 12,951.34 and 5,136.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,385.01 : 12,951.34 = 5,136.12 : x
2. Step 2: Convert to fraction form
   9,385.01/12,951.34 = 5,136.12/x
3. Step 3: Cross multiply
   9,385.01x = 12,951.34 × 5,136.12
4. Step 4: Simplify right side
   9,385.01x = 66,519,636.40
5. Step 5: Solve for x
   x = 66,519,636.40/9,385.01
6. Step 6: Final answer
   x = 7,087.86