Finding the Fourth Proportional to 72,514.08, 100,071.15 and 40,685.31

Step by Step Solution

1. Step 1: Write the proportion equation
   72,514.08 : 100,071.15 = 40,685.31 : x
2. Step 2: Convert to fraction form
   72,514.08/100,071.15 = 40,685.31/x
3. Step 3: Cross multiply
   72,514.08x = 100,071.15 × 40,685.31
4. Step 4: Simplify right side
   72,514.08x = 4,071,425,759.81
5. Step 5: Solve for x
   x = 4,071,425,759.81/72,514.08
6. Step 6: Final answer
   x = 56,146.69