Finding the Fourth Proportional to 72,445.89, 108,659.60 and 28,042.26

Step by Step Solution

1. Step 1: Write the proportion equation
   72,445.89 : 108,659.60 = 28,042.26 : x
2. Step 2: Convert to fraction form
   72,445.89/108,659.60 = 28,042.26/x
3. Step 3: Cross multiply
   72,445.89x = 108,659.60 × 28,042.26
4. Step 4: Simplify right side
   72,445.89x = 3,047,060,614.48
5. Step 5: Solve for x
   x = 3,047,060,614.48/72,445.89
6. Step 6: Final answer
   x = 42,059.81