Finding the Fourth Proportional to 42,707.52, 64,083.96 and 19,031.76

Step by Step Solution

1. Step 1: Write the proportion equation
   42,707.52 : 64,083.96 = 19,031.76 : x
2. Step 2: Convert to fraction form
   42,707.52/64,083.96 = 19,031.76/x
3. Step 3: Cross multiply
   42,707.52x = 64,083.96 × 19,031.76
4. Step 4: Simplify right side
   42,707.52x = 1,219,630,546.57
5. Step 5: Solve for x
   x = 1,219,630,546.57/42,707.52
6. Step 6: Final answer
   x = 28,557.75