Finding the Fourth Proportional to 76,344, 105,359.58 and 42,810

Step by Step Solution

1. Step 1: Write the proportion equation
   76,344 : 105,359.58 = 42,810 : x
2. Step 2: Convert to fraction form
   76,344/105,359.58 = 42,810/x
3. Step 3: Cross multiply
   76,344x = 105,359.58 × 42,810
4. Step 4: Simplify right side
   76,344x = 4,510,443,619.80
5. Step 5: Solve for x
   x = 4,510,443,619.80/76,344
6. Step 6: Final answer
   x = 59,080.53