Finding the Fourth Proportional to 42,917.31, 64,382.94 and 13,342.01

Step by Step Solution

1. Step 1: Write the proportion equation
   42,917.31 : 64,382.94 = 13,342.01 : x
2. Step 2: Convert to fraction form
   42,917.31/64,382.94 = 13,342.01/x
3. Step 3: Cross multiply
   42,917.31x = 64,382.94 × 13,342.01
4. Step 4: Simplify right side
   42,917.31x = 858,997,507.39
5. Step 5: Solve for x
   x = 858,997,507.39/42,917.31
6. Step 6: Final answer
   x = 20,015.18