Finding the Fourth Proportional to 76,477.42, 105,539.34 and 42,485.50

Step by Step Solution

1. Step 1: Write the proportion equation
   76,477.42 : 105,539.34 = 42,485.50 : x
2. Step 2: Convert to fraction form
   76,477.42/105,539.34 = 42,485.50/x
3. Step 3: Cross multiply
   76,477.42x = 105,539.34 × 42,485.50
4. Step 4: Simplify right side
   76,477.42x = 4,483,891,629.57
5. Step 5: Solve for x
   x = 4,483,891,629.57/76,477.42
6. Step 6: Final answer
   x = 58,630.27