Finding the Fourth Proportional to 28,084.78, 42,106.38 and 13,276.41

Step by Step Solution

1. Step 1: Write the proportion equation
   28,084.78 : 42,106.38 = 13,276.41 : x
2. Step 2: Convert to fraction form
   28,084.78/42,106.38 = 13,276.41/x
3. Step 3: Cross multiply
   28,084.78x = 42,106.38 × 13,276.41
4. Step 4: Simplify right side
   28,084.78x = 559,021,353.96
5. Step 5: Solve for x
   x = 559,021,353.96/28,084.78
6. Step 6: Final answer
   x = 19,904.78