Finding the Fourth Proportional to 42,790.77, 64,201.35 and 19,096.15

Step by Step Solution

1. Step 1: Write the proportion equation
   42,790.77 : 64,201.35 = 19,096.15 : x
2. Step 2: Convert to fraction form
   42,790.77/64,201.35 = 19,096.15/x
3. Step 3: Cross multiply
   42,790.77x = 64,201.35 × 19,096.15
4. Step 4: Simplify right side
   42,790.77x = 1,225,998,609.80
5. Step 5: Solve for x
   x = 1,225,998,609.80/42,790.77
6. Step 6: Final answer
   x = 28,651.01