Finding the Fourth Proportional to 52,456.28, 72,390.06 and 28,583.60

Step by Step Solution

1. Step 1: Write the proportion equation
   52,456.28 : 72,390.06 = 28,583.60 : x
2. Step 2: Convert to fraction form
   52,456.28/72,390.06 = 28,583.60/x
3. Step 3: Cross multiply
   52,456.28x = 72,390.06 × 28,583.60
4. Step 4: Simplify right side
   52,456.28x = 2,069,168,519.02
5. Step 5: Solve for x
   x = 2,069,168,519.02/52,456.28
6. Step 6: Final answer
   x = 39,445.58