Finding the Fourth Proportional to 78,439.05, 108,246.72 and 42,629.06

Step by Step Solution

1. Step 1: Write the proportion equation
   78,439.05 : 108,246.72 = 42,629.06 : x
2. Step 2: Convert to fraction form
   78,439.05/108,246.72 = 42,629.06/x
3. Step 3: Cross multiply
   78,439.05x = 108,246.72 × 42,629.06
4. Step 4: Simplify right side
   78,439.05x = 4,614,455,380.45
5. Step 5: Solve for x
   x = 4,614,455,380.45/78,439.05
6. Step 6: Final answer
   x = 58,828.55