Finding the Fourth Proportional to 72,709.56, 108,869.83 and 42,699.06

Step by Step Solution

1. Step 1: Write the proportion equation
   72,709.56 : 108,869.83 = 42,699.06 : x
2. Step 2: Convert to fraction form
   72,709.56/108,869.83 = 42,699.06/x
3. Step 3: Cross multiply
   72,709.56x = 108,869.83 × 42,699.06
4. Step 4: Simplify right side
   72,709.56x = 4,648,639,403.36
5. Step 5: Solve for x
   x = 4,648,639,403.36/72,709.56
6. Step 6: Final answer
   x = 63,934.36