Finding the Fourth Proportional to 9,155.31, 12,634.28 and 4,963.47

Step by Step Solution

1. Step 1: Write the proportion equation
   9,155.31 : 12,634.28 = 4,963.47 : x
2. Step 2: Convert to fraction form
   9,155.31/12,634.28 = 4,963.47/x
3. Step 3: Cross multiply
   9,155.31x = 12,634.28 × 4,963.47
4. Step 4: Simplify right side
   9,155.31x = 62,709,844.93
5. Step 5: Solve for x
   x = 62,709,844.93/9,155.31
6. Step 6: Final answer
   x = 6,849.56