Finding the Fourth Proportional to 76,489.84, 105,566.52 and 42,958

Step by Step Solution

1. Step 1: Write the proportion equation
   76,489.84 : 105,566.52 = 42,958 : x
2. Step 2: Convert to fraction form
   76,489.84/105,566.52 = 42,958/x
3. Step 3: Cross multiply
   76,489.84x = 105,566.52 × 42,958
4. Step 4: Simplify right side
   76,489.84x = 4,534,926,566.16
5. Step 5: Solve for x
   x = 4,534,926,566.16/76,489.84
6. Step 6: Final answer
   x = 59,287.96