Finding the Fourth Proportional to 42,914.30, 64,345.38 and 19,217.34

Step by Step Solution

1. Step 1: Write the proportion equation
   42,914.30 : 64,345.38 = 19,217.34 : x
2. Step 2: Convert to fraction form
   42,914.30/64,345.38 = 19,217.34/x
3. Step 3: Cross multiply
   42,914.30x = 64,345.38 × 19,217.34
4. Step 4: Simplify right side
   42,914.30x = 1,236,547,044.89
5. Step 5: Solve for x
   x = 1,236,547,044.89/42,914.30
6. Step 6: Final answer
   x = 28,814.34