Finding the Fourth Proportional to 51,561.02, 71,156.16 and 28,900.43

Step by Step Solution

1. Step 1: Write the proportion equation
   51,561.02 : 71,156.16 = 28,900.43 : x
2. Step 2: Convert to fraction form
   51,561.02/71,156.16 = 28,900.43/x
3. Step 3: Cross multiply
   51,561.02x = 71,156.16 × 28,900.43
4. Step 4: Simplify right side
   51,561.02x = 2,056,443,621.15
5. Step 5: Solve for x
   x = 2,056,443,621.15/51,561.02
6. Step 6: Final answer
   x = 39,883.69