Finding the Fourth Proportional to 42,735.42, 64,110.42 and 13,152.60

Step by Step Solution

1. Step 1: Write the proportion equation
   42,735.42 : 64,110.42 = 13,152.60 : x
2. Step 2: Convert to fraction form
   42,735.42/64,110.42 = 13,152.60/x
3. Step 3: Cross multiply
   42,735.42x = 64,110.42 × 13,152.60
4. Step 4: Simplify right side
   42,735.42x = 843,218,710.09
5. Step 5: Solve for x
   x = 843,218,710.09/42,735.42
6. Step 6: Final answer
   x = 19,731.14