Finding the Fourth Proportional to 71,395.30, 106,990.55 and 52,528.10

Step by Step Solution

1. Step 1: Write the proportion equation
   71,395.30 : 106,990.55 = 52,528.10 : x
2. Step 2: Convert to fraction form
   71,395.30/106,990.55 = 52,528.10/x
3. Step 3: Cross multiply
   71,395.30x = 106,990.55 × 52,528.10
4. Step 4: Simplify right side
   71,395.30x = 5,620,010,309.46
5. Step 5: Solve for x
   x = 5,620,010,309.46/71,395.30
6. Step 6: Final answer
   x = 78,716.81