Finding the Fourth Proportional to 76,216.64, 105,086.04 and 56,012

Step by Step Solution

1. Step 1: Write the proportion equation
   76,216.64 : 105,086.04 = 56,012 : x
2. Step 2: Convert to fraction form
   76,216.64/105,086.04 = 56,012/x
3. Step 3: Cross multiply
   76,216.64x = 105,086.04 × 56,012
4. Step 4: Simplify right side
   76,216.64x = 5,886,079,272.48
5. Step 5: Solve for x
   x = 5,886,079,272.48/76,216.64
6. Step 6: Final answer
   x = 77,228.27