Finding the Fourth Proportional to 42,778.53, 64,162.76 and 13,193.82

Step by Step Solution

1. Step 1: Write the proportion equation
   42,778.53 : 64,162.76 = 13,193.82 : x
2. Step 2: Convert to fraction form
   42,778.53/64,162.76 = 13,193.82/x
3. Step 3: Cross multiply
   42,778.53x = 64,162.76 × 13,193.82
4. Step 4: Simplify right side
   42,778.53x = 846,551,840.17
5. Step 5: Solve for x
   x = 846,551,840.17/42,778.53
6. Step 6: Final answer
   x = 19,789.18