Finding the Fourth Proportional to 42,826.53, 64,242.83 and 13,246.74

Step by Step Solution

1. Step 1: Write the proportion equation
   42,826.53 : 64,242.83 = 13,246.74 : x
2. Step 2: Convert to fraction form
   42,826.53/64,242.83 = 13,246.74/x
3. Step 3: Cross multiply
   42,826.53x = 64,242.83 × 13,246.74
4. Step 4: Simplify right side
   42,826.53x = 851,008,160.25
5. Step 5: Solve for x
   x = 851,008,160.25/42,826.53
6. Step 6: Final answer
   x = 19,871.05