Finding the Fourth Proportional to 9,091.31, 12,546.09 and 5,112.39

Step by Step Solution

1. Step 1: Write the proportion equation
   9,091.31 : 12,546.09 = 5,112.39 : x
2. Step 2: Convert to fraction form
   9,091.31/12,546.09 = 5,112.39/x
3. Step 3: Cross multiply
   9,091.31x = 12,546.09 × 5,112.39
4. Step 4: Simplify right side
   9,091.31x = 64,140,492.27
5. Step 5: Solve for x
   x = 64,140,492.27/9,091.31
6. Step 6: Final answer
   x = 7,055.14