Finding the Fourth Proportional to 9,145.31, 12,620.54 and 4,953.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,145.31 : 12,620.54 = 4,953.56 : x
2. Step 2: Convert to fraction form
   9,145.31/12,620.54 = 4,953.56/x
3. Step 3: Cross multiply
   9,145.31x = 12,620.54 × 4,953.56
4. Step 4: Simplify right side
   9,145.31x = 62,516,608.91
5. Step 5: Solve for x
   x = 62,516,608.91/9,145.31
6. Step 6: Final answer
   x = 6,835.92