Finding the Fourth Proportional to 69,834.45, 96,373.72 and 39,621.05

Step by Step Solution

1. Step 1: Write the proportion equation
   69,834.45 : 96,373.72 = 39,621.05 : x
2. Step 2: Convert to fraction form
   69,834.45/96,373.72 = 39,621.05/x
3. Step 3: Cross multiply
   69,834.45x = 96,373.72 × 39,621.05
4. Step 4: Simplify right side
   69,834.45x = 3,818,428,019.30
5. Step 5: Solve for x
   x = 3,818,428,019.30/69,834.45
6. Step 6: Final answer
   x = 54,678.28