Finding the Fourth Proportional to 9,145.51, 12,620.54 and 5,368.61

Step by Step Solution

1. Step 1: Write the proportion equation
   9,145.51 : 12,620.54 = 5,368.61 : x
2. Step 2: Convert to fraction form
   9,145.51/12,620.54 = 5,368.61/x
3. Step 3: Cross multiply
   9,145.51x = 12,620.54 × 5,368.61
4. Step 4: Simplify right side
   9,145.51x = 67,754,802.22
5. Step 5: Solve for x
   x = 67,754,802.22/9,145.51
6. Step 6: Final answer
   x = 7,408.53