Finding the Fourth Proportional to 76,743.81, 105,902.33 and 42,287.46

Step by Step Solution

1. Step 1: Write the proportion equation
   76,743.81 : 105,902.33 = 42,287.46 : x
2. Step 2: Convert to fraction form
   76,743.81/105,902.33 = 42,287.46/x
3. Step 3: Cross multiply
   76,743.81x = 105,902.33 × 42,287.46
4. Step 4: Simplify right side
   76,743.81x = 4,478,340,332.34
5. Step 5: Solve for x
   x = 4,478,340,332.34/76,743.81
6. Step 6: Final answer
   x = 58,354.42