Finding the Fourth Proportional to 76,440.06, 105,485.91 and 42,448.62

Step by Step Solution

1. Step 1: Write the proportion equation
   76,440.06 : 105,485.91 = 42,448.62 : x
2. Step 2: Convert to fraction form
   76,440.06/105,485.91 = 42,448.62/x
3. Step 3: Cross multiply
   76,440.06x = 105,485.91 × 42,448.62
4. Step 4: Simplify right side
   76,440.06x = 4,477,731,308.94
5. Step 5: Solve for x
   x = 4,477,731,308.94/76,440.06
6. Step 6: Final answer
   x = 58,578.33