Finding the Fourth Proportional to 42,743.76, 64,123.02 and 19,059.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,743.76 : 64,123.02 = 19,059.72 : x
2. Step 2: Convert to fraction form
   42,743.76/64,123.02 = 19,059.72/x
3. Step 3: Cross multiply
   42,743.76x = 64,123.02 × 19,059.72
4. Step 4: Simplify right side
   42,743.76x = 1,222,166,806.75
5. Step 5: Solve for x
   x = 1,222,166,806.75/42,743.76
6. Step 6: Final answer
   x = 28,592.87