Finding the Fourth Proportional to 9,090.78, 12,547.41 and 5,366.94

Step by Step Solution

1. Step 1: Write the proportion equation
   9,090.78 : 12,547.41 = 5,366.94 : x
2. Step 2: Convert to fraction form
   9,090.78/12,547.41 = 5,366.94/x
3. Step 3: Cross multiply
   9,090.78x = 12,547.41 × 5,366.94
4. Step 4: Simplify right side
   9,090.78x = 67,341,196.63
5. Step 5: Solve for x
   x = 67,341,196.63/9,090.78
6. Step 6: Final answer
   x = 7,407.64