Finding the Fourth Proportional to 72,116.87, 99,522.09 and 39,851.35

Step by Step Solution

1. Step 1: Write the proportion equation
   72,116.87 : 99,522.09 = 39,851.35 : x
2. Step 2: Convert to fraction form
   72,116.87/99,522.09 = 39,851.35/x
3. Step 3: Cross multiply
   72,116.87x = 99,522.09 × 39,851.35
4. Step 4: Simplify right side
   72,116.87x = 3,966,089,641.32
5. Step 5: Solve for x
   x = 3,966,089,641.32/72,116.87
6. Step 6: Final answer
   x = 54,995.31