Finding the Fourth Proportional to 52,620.28, 72,615.72 and 28,748.32

Step by Step Solution

1. Step 1: Write the proportion equation
   52,620.28 : 72,615.72 = 28,748.32 : x
2. Step 2: Convert to fraction form
   52,620.28/72,615.72 = 28,748.32/x
3. Step 3: Cross multiply
   52,620.28x = 72,615.72 × 28,748.32
4. Step 4: Simplify right side
   52,620.28x = 2,087,579,955.59
5. Step 5: Solve for x
   x = 2,087,579,955.59/52,620.28
6. Step 6: Final answer
   x = 39,672.54