Finding the Fourth Proportional to 42,953.85, 64,404.89 and 19,257.11

Step by Step Solution

1. Step 1: Write the proportion equation
   42,953.85 : 64,404.89 = 19,257.11 : x
2. Step 2: Convert to fraction form
   42,953.85/64,404.89 = 19,257.11/x
3. Step 3: Cross multiply
   42,953.85x = 64,404.89 × 19,257.11
4. Step 4: Simplify right side
   42,953.85x = 1,240,252,224.32
5. Step 5: Solve for x
   x = 1,240,252,224.32/42,953.85
6. Step 6: Final answer
   x = 28,874.06