Finding the Fourth Proportional to 28,111.96, 42,200.34 and 19,284.58

Step by Step Solution

1. Step 1: Write the proportion equation
   28,111.96 : 42,200.34 = 19,284.58 : x
2. Step 2: Convert to fraction form
   28,111.96/42,200.34 = 19,284.58/x
3. Step 3: Cross multiply
   28,111.96x = 42,200.34 × 19,284.58
4. Step 4: Simplify right side
   28,111.96x = 813,815,832.76
5. Step 5: Solve for x
   x = 813,815,832.76/28,111.96
6. Step 6: Final answer
   x = 28,949.10