Finding the Fourth Proportional to 76,438.02, 105,485.56 and 42,448.62

Step by Step Solution

1. Step 1: Write the proportion equation
   76,438.02 : 105,485.56 = 42,448.62 : x
2. Step 2: Convert to fraction form
   76,438.02/105,485.56 = 42,448.62/x
3. Step 3: Cross multiply
   76,438.02x = 105,485.56 × 42,448.62
4. Step 4: Simplify right side
   76,438.02x = 4,477,716,451.93
5. Step 5: Solve for x
   x = 4,477,716,451.93/76,438.02
6. Step 6: Final answer
   x = 58,579.70