Finding the Fourth Proportional to 72,581.61, 108,830.03 and 28,156.45

Step by Step Solution

1. Step 1: Write the proportion equation
   72,581.61 : 108,830.03 = 28,156.45 : x
2. Step 2: Convert to fraction form
   72,581.61/108,830.03 = 28,156.45/x
3. Step 3: Cross multiply
   72,581.61x = 108,830.03 × 28,156.45
4. Step 4: Simplify right side
   72,581.61x = 3,064,267,096.51
5. Step 5: Solve for x
   x = 3,064,267,096.51/72,581.61
6. Step 6: Final answer
   x = 42,218.23