Finding the Fourth Proportional to 76,494.29, 105,561.78 and 42,508.31

Step by Step Solution

1. Step 1: Write the proportion equation
   76,494.29 : 105,561.78 = 42,508.31 : x
2. Step 2: Convert to fraction form
   76,494.29/105,561.78 = 42,508.31/x
3. Step 3: Cross multiply
   76,494.29x = 105,561.78 × 42,508.31
4. Step 4: Simplify right side
   76,494.29x = 4,487,252,868.39
5. Step 5: Solve for x
   x = 4,487,252,868.39/76,494.29
6. Step 6: Final answer
   x = 58,661.28