Finding the Fourth Proportional to 76,322.24, 105,325.56 and 42,331.40

Step by Step Solution

1. Step 1: Write the proportion equation
   76,322.24 : 105,325.56 = 42,331.40 : x
2. Step 2: Convert to fraction form
   76,322.24/105,325.56 = 42,331.40/x
3. Step 3: Cross multiply
   76,322.24x = 105,325.56 × 42,331.40
4. Step 4: Simplify right side
   76,322.24x = 4,458,578,410.58
5. Step 5: Solve for x
   x = 4,458,578,410.58/76,322.24
6. Step 6: Final answer
   x = 58,417.81