Finding the Fourth Proportional to 72,853.74, 109,308.15 and 28,512.18

Step by Step Solution

1. Step 1: Write the proportion equation
   72,853.74 : 109,308.15 = 28,512.18 : x
2. Step 2: Convert to fraction form
   72,853.74/109,308.15 = 28,512.18/x
3. Step 3: Cross multiply
   72,853.74x = 109,308.15 × 28,512.18
4. Step 4: Simplify right side
   72,853.74x = 3,116,613,648.27
5. Step 5: Solve for x
   x = 3,116,613,648.27/72,853.74
6. Step 6: Final answer
   x = 42,779.05