Finding the Fourth Proportional to 9,972.61, 14,913.34 and 7,475.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,972.61 : 14,913.34 = 7,475.78 : x
2. Step 2: Convert to fraction form
   9,972.61/14,913.34 = 7,475.78/x
3. Step 3: Cross multiply
   9,972.61x = 14,913.34 × 7,475.78
4. Step 4: Simplify right side
   9,972.61x = 111,488,848.91
5. Step 5: Solve for x
   x = 111,488,848.91/9,972.61
6. Step 6: Final answer
   x = 11,179.51