Finding the Fourth Proportional to 52,513.63, 72,468.81 and 28,640.30

Step by Step Solution

1. Step 1: Write the proportion equation
   52,513.63 : 72,468.81 = 28,640.30 : x
2. Step 2: Convert to fraction form
   52,513.63/72,468.81 = 28,640.30/x
3. Step 3: Cross multiply
   52,513.63x = 72,468.81 × 28,640.30
4. Step 4: Simplify right side
   52,513.63x = 2,075,528,596.79
5. Step 5: Solve for x
   x = 2,075,528,596.79/52,513.63
6. Step 6: Final answer
   x = 39,523.62