Finding the Fourth Proportional to 28,648.52, 42,957.06 and 9,926.88

Step by Step Solution

1. Step 1: Write the proportion equation
   28,648.52 : 42,957.06 = 9,926.88 : x
2. Step 2: Convert to fraction form
   28,648.52/42,957.06 = 9,926.88/x
3. Step 3: Cross multiply
   28,648.52x = 42,957.06 × 9,926.88
4. Step 4: Simplify right side
   28,648.52x = 426,429,579.77
5. Step 5: Solve for x
   x = 426,429,579.77/28,648.52
6. Step 6: Final answer
   x = 14,884.88