Finding the Fourth Proportional to 52,899.96, 72,990.54 and 30,531

Step by Step Solution

1. Step 1: Write the proportion equation
   52,899.96 : 72,990.54 = 30,531 : x
2. Step 2: Convert to fraction form
   52,899.96/72,990.54 = 30,531/x
3. Step 3: Cross multiply
   52,899.96x = 72,990.54 × 30,531
4. Step 4: Simplify right side
   52,899.96x = 2,228,474,176.74
5. Step 5: Solve for x
   x = 2,228,474,176.74/52,899.96
6. Step 6: Final answer
   x = 42,126.20