Finding the Fourth Proportional to 9,145.60, 12,620.72 and 4,953.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,145.60 : 12,620.72 = 4,953.76 : x
2. Step 2: Convert to fraction form
   9,145.60/12,620.72 = 4,953.76/x
3. Step 3: Cross multiply
   9,145.60x = 12,620.72 × 4,953.76
4. Step 4: Simplify right side
   9,145.60x = 62,520,017.91
5. Step 5: Solve for x
   x = 62,520,017.91/9,145.60
6. Step 6: Final answer
   x = 6,836.08