Finding the Fourth Proportional to 76,499, 105,578.52 and 42,965

Step by Step Solution

1. Step 1: Write the proportion equation
   76,499 : 105,578.52 = 42,965 : x
2. Step 2: Convert to fraction form
   76,499/105,578.52 = 42,965/x
3. Step 3: Cross multiply
   76,499x = 105,578.52 × 42,965
4. Step 4: Simplify right side
   76,499x = 4,536,181,111.80
5. Step 5: Solve for x
   x = 4,536,181,111.80/76,499
6. Step 6: Final answer
   x = 59,297.26