Finding the Fourth Proportional to 76,398.32, 105,437.64 and 42,864.56

Step by Step Solution

1. Step 1: Write the proportion equation
   76,398.32 : 105,437.64 = 42,864.56 : x
2. Step 2: Convert to fraction form
   76,398.32/105,437.64 = 42,864.56/x
3. Step 3: Cross multiply
   76,398.32x = 105,437.64 × 42,864.56
4. Step 4: Simplify right side
   76,398.32x = 4,519,538,046.04
5. Step 5: Solve for x
   x = 4,519,538,046.04/76,398.32
6. Step 6: Final answer
   x = 59,157.56