Finding the Fourth Proportional to 42,736.92, 64,103.52 and 13,157.76

Step by Step Solution

1. Step 1: Write the proportion equation
   42,736.92 : 64,103.52 = 13,157.76 : x
2. Step 2: Convert to fraction form
   42,736.92/64,103.52 = 13,157.76/x
3. Step 3: Cross multiply
   42,736.92x = 64,103.52 × 13,157.76
4. Step 4: Simplify right side
   42,736.92x = 843,458,731.32
5. Step 5: Solve for x
   x = 843,458,731.32/42,736.92
6. Step 6: Final answer
   x = 19,736.07