Finding the Fourth Proportional to 72,383.40, 108,570.96 and 42,987.96

Step by Step Solution

1. Step 1: Write the proportion equation
   72,383.40 : 108,570.96 = 42,987.96 : x
2. Step 2: Convert to fraction form
   72,383.40/108,570.96 = 42,987.96/x
3. Step 3: Cross multiply
   72,383.40x = 108,570.96 × 42,987.96
4. Step 4: Simplify right side
   72,383.40x = 4,667,244,085.64
5. Step 5: Solve for x
   x = 4,667,244,085.64/72,383.40
6. Step 6: Final answer
   x = 64,479.48