Finding the Fourth Proportional to 10,953.86, 15,123.39 and 9,772.88

Step by Step Solution

1. Step 1: Write the proportion equation
   10,953.86 : 15,123.39 = 9,772.88 : x
2. Step 2: Convert to fraction form
   10,953.86/15,123.39 = 9,772.88/x
3. Step 3: Cross multiply
   10,953.86x = 15,123.39 × 9,772.88
4. Step 4: Simplify right side
   10,953.86x = 147,799,075.66
5. Step 5: Solve for x
   x = 147,799,075.66/10,953.86
6. Step 6: Final answer
   x = 13,492.88