Finding the Fourth Proportional to 42,898.41, 64,321.61 and 19,201.59

Step by Step Solution

1. Step 1: Write the proportion equation
   42,898.41 : 64,321.61 = 19,201.59 : x
2. Step 2: Convert to fraction form
   42,898.41/64,321.61 = 19,201.59/x
3. Step 3: Cross multiply
   42,898.41x = 64,321.61 × 19,201.59
4. Step 4: Simplify right side
   42,898.41x = 1,235,077,087.35
5. Step 5: Solve for x
   x = 1,235,077,087.35/42,898.41
6. Step 6: Final answer
   x = 28,790.74