Finding the Fourth Proportional to 72,919.56, 109,375.69 and 28,554.45

Step by Step Solution

1. Step 1: Write the proportion equation
   72,919.56 : 109,375.69 = 28,554.45 : x
2. Step 2: Convert to fraction form
   72,919.56/109,375.69 = 28,554.45/x
3. Step 3: Cross multiply
   72,919.56x = 109,375.69 × 28,554.45
4. Step 4: Simplify right side
   72,919.56x = 3,123,162,671.32
5. Step 5: Solve for x
   x = 3,123,162,671.32/72,919.56
6. Step 6: Final answer
   x = 42,830.25