Finding the Fourth Proportional to 76,345.57, 105,357.16 and 42,354.73

Step by Step Solution

1. Step 1: Write the proportion equation
   76,345.57 : 105,357.16 = 42,354.73 : x
2. Step 2: Convert to fraction form
   76,345.57/105,357.16 = 42,354.73/x
3. Step 3: Cross multiply
   76,345.57x = 105,357.16 × 42,354.73
4. Step 4: Simplify right side
   76,345.57x = 4,462,374,011.76
5. Step 5: Solve for x
   x = 4,462,374,011.76/76,345.57
6. Step 6: Final answer
   x = 58,449.68