Finding the Fourth Proportional to 42,842.64, 64,253.52 and 12,851.04

Step by Step Solution

1. Step 1: Write the proportion equation
   42,842.64 : 64,253.52 = 12,851.04 : x
2. Step 2: Convert to fraction form
   42,842.64/64,253.52 = 12,851.04/x
3. Step 3: Cross multiply
   42,842.64x = 64,253.52 × 12,851.04
4. Step 4: Simplify right side
   42,842.64x = 825,724,555.66
5. Step 5: Solve for x
   x = 825,724,555.66/42,842.64
6. Step 6: Final answer
   x = 19,273.43