Finding the Fourth Proportional to 76,673.76, 105,802.37 and 56,541.48

Step by Step Solution

1. Step 1: Write the proportion equation
   76,673.76 : 105,802.37 = 56,541.48 : x
2. Step 2: Convert to fraction form
   76,673.76/105,802.37 = 56,541.48/x
3. Step 3: Cross multiply
   76,673.76x = 105,802.37 × 56,541.48
4. Step 4: Simplify right side
   76,673.76x = 5,982,223,125.42
5. Step 5: Solve for x
   x = 5,982,223,125.42/76,673.76
6. Step 6: Final answer
   x = 78,021.77