Finding the Fourth Proportional to 72,531.86, 108,775.92 and 28,148.72

Step by Step Solution

1. Step 1: Write the proportion equation
   72,531.86 : 108,775.92 = 28,148.72 : x
2. Step 2: Convert to fraction form
   72,531.86/108,775.92 = 28,148.72/x
3. Step 3: Cross multiply
   72,531.86x = 108,775.92 × 28,148.72
4. Step 4: Simplify right side
   72,531.86x = 3,061,902,914.82
5. Step 5: Solve for x
   x = 3,061,902,914.82/72,531.86
6. Step 6: Final answer
   x = 42,214.59