Finding the Fourth Proportional to 9,151.01, 12,627.70 and 5,172.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,151.01 : 12,627.70 = 5,172.50 : x
2. Step 2: Convert to fraction form
   9,151.01/12,627.70 = 5,172.50/x
3. Step 3: Cross multiply
   9,151.01x = 12,627.70 × 5,172.50
4. Step 4: Simplify right side
   9,151.01x = 65,316,689.25
5. Step 5: Solve for x
   x = 65,316,689.25/9,151.01
6. Step 6: Final answer
   x = 7,137.65