Finding the Fourth Proportional to 28,607.60, 42,900.86 and 9,882.83

Step by Step Solution

1. Step 1: Write the proportion equation
   28,607.60 : 42,900.86 = 9,882.83 : x
2. Step 2: Convert to fraction form
   28,607.60/42,900.86 = 9,882.83/x
3. Step 3: Cross multiply
   28,607.60x = 42,900.86 × 9,882.83
4. Step 4: Simplify right side
   28,607.60x = 423,981,823.69
5. Step 5: Solve for x
   x = 423,981,823.69/28,607.60
6. Step 6: Final answer
   x = 14,820.60