Finding the Fourth Proportional to 42,796.94, 64,190.54 and 13,214.94

Step by Step Solution

1. Step 1: Write the proportion equation
   42,796.94 : 64,190.54 = 13,214.94 : x
2. Step 2: Convert to fraction form
   42,796.94/64,190.54 = 13,214.94/x
3. Step 3: Cross multiply
   42,796.94x = 64,190.54 × 13,214.94
4. Step 4: Simplify right side
   42,796.94x = 848,274,134.67
5. Step 5: Solve for x
   x = 848,274,134.67/42,796.94
6. Step 6: Final answer
   x = 19,820.91