Finding the Fourth Proportional to 76,439.93, 105,483.56 and 42,450.58

Step by Step Solution

1. Step 1: Write the proportion equation
   76,439.93 : 105,483.56 = 42,450.58 : x
2. Step 2: Convert to fraction form
   76,439.93/105,483.56 = 42,450.58/x
3. Step 3: Cross multiply
   76,439.93x = 105,483.56 × 42,450.58
4. Step 4: Simplify right side
   76,439.93x = 4,477,838,302.46
5. Step 5: Solve for x
   x = 4,477,838,302.46/76,439.93
6. Step 6: Final answer
   x = 58,579.83