Finding the Fourth Proportional to 42,969.76, 64,456.39 and 20,468.87

Step by Step Solution

1. Step 1: Write the proportion equation
   42,969.76 : 64,456.39 = 20,468.87 : x
2. Step 2: Convert to fraction form
   42,969.76/64,456.39 = 20,468.87/x
3. Step 3: Cross multiply
   42,969.76x = 64,456.39 × 20,468.87
4. Step 4: Simplify right side
   42,969.76x = 1,319,349,365.23
5. Step 5: Solve for x
   x = 1,319,349,365.23/42,969.76
6. Step 6: Final answer
   x = 30,704.14