Finding the Fourth Proportional to 71,818.47, 99,109.47 and 39,994.87

Step by Step Solution

1. Step 1: Write the proportion equation
   71,818.47 : 99,109.47 = 39,994.87 : x
2. Step 2: Convert to fraction form
   71,818.47/99,109.47 = 39,994.87/x
3. Step 3: Cross multiply
   71,818.47x = 99,109.47 × 39,994.87
4. Step 4: Simplify right side
   71,818.47x = 3,963,870,368.42
5. Step 5: Solve for x
   x = 3,963,870,368.42/71,818.47
6. Step 6: Final answer
   x = 55,192.91