Finding the Fourth Proportional to 42,692.47, 64,031.51 and 15,669.23

Step by Step Solution

1. Step 1: Write the proportion equation
   42,692.47 : 64,031.51 = 15,669.23 : x
2. Step 2: Convert to fraction form
   42,692.47/64,031.51 = 15,669.23/x
3. Step 3: Cross multiply
   42,692.47x = 64,031.51 × 15,669.23
4. Step 4: Simplify right side
   42,692.47x = 1,003,324,158.56
5. Step 5: Solve for x
   x = 1,003,324,158.56/42,692.47
6. Step 6: Final answer
   x = 23,501.20