Finding the Fourth Proportional to 42,747.76, 64,129.02 and 19,063.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,747.76 : 64,129.02 = 19,063.72 : x
2. Step 2: Convert to fraction form
   42,747.76/64,129.02 = 19,063.72/x
3. Step 3: Cross multiply
   42,747.76x = 64,129.02 × 19,063.72
4. Step 4: Simplify right side
   42,747.76x = 1,222,537,681.15
5. Step 5: Solve for x
   x = 1,222,537,681.15/42,747.76
6. Step 6: Final answer
   x = 28,598.87