Finding the Fourth Proportional to 9,091.90, 12,546.12 and 5,112.22

Step by Step Solution

1. Step 1: Write the proportion equation
   9,091.90 : 12,546.12 = 5,112.22 : x
2. Step 2: Convert to fraction form
   9,091.90/12,546.12 = 5,112.22/x
3. Step 3: Cross multiply
   9,091.90x = 12,546.12 × 5,112.22
4. Step 4: Simplify right side
   9,091.90x = 64,138,525.59
5. Step 5: Solve for x
   x = 64,138,525.59/9,091.90
6. Step 6: Final answer
   x = 7,054.47