Finding the Fourth Proportional to 42,854.72, 64,285.14 and 13,268.76

Step by Step Solution

1. Step 1: Write the proportion equation
   42,854.72 : 64,285.14 = 13,268.76 : x
2. Step 2: Convert to fraction form
   42,854.72/64,285.14 = 13,268.76/x
3. Step 3: Cross multiply
   42,854.72x = 64,285.14 × 13,268.76
4. Step 4: Simplify right side
   42,854.72x = 852,984,094.23
5. Step 5: Solve for x
   x = 852,984,094.23/42,854.72
6. Step 6: Final answer
   x = 19,904.09