Finding the Fourth Proportional to 52,275.45, 72,139.74 and 28,402.32

Step by Step Solution

1. Step 1: Write the proportion equation
   52,275.45 : 72,139.74 = 28,402.32 : x
2. Step 2: Convert to fraction form
   52,275.45/72,139.74 = 28,402.32/x
3. Step 3: Cross multiply
   52,275.45x = 72,139.74 × 28,402.32
4. Step 4: Simplify right side
   52,275.45x = 2,048,935,980.20
5. Step 5: Solve for x
   x = 2,048,935,980.20/52,275.45
6. Step 6: Final answer
   x = 39,194.99