Finding the Fourth Proportional to 28,276.76, 39,016.86 and 18,335

Step by Step Solution

1. Step 1: Write the proportion equation
   28,276.76 : 39,016.86 = 18,335 : x
2. Step 2: Convert to fraction form
   28,276.76/39,016.86 = 18,335/x
3. Step 3: Cross multiply
   28,276.76x = 39,016.86 × 18,335
4. Step 4: Simplify right side
   28,276.76x = 715,374,128.10
5. Step 5: Solve for x
   x = 715,374,128.10/28,276.76
6. Step 6: Final answer
   x = 25,299.01