Finding the Fourth Proportional to 42,734.92, 64,109.67 and 13,152.10

Step by Step Solution

1. Step 1: Write the proportion equation
   42,734.92 : 64,109.67 = 13,152.10 : x
2. Step 2: Convert to fraction form
   42,734.92/64,109.67 = 13,152.10/x
3. Step 3: Cross multiply
   42,734.92x = 64,109.67 × 13,152.10
4. Step 4: Simplify right side
   42,734.92x = 843,176,790.81
5. Step 5: Solve for x
   x = 843,176,790.81/42,734.92
6. Step 6: Final answer
   x = 19,730.39