Finding the Fourth Proportional to 76,216.55, 105,069.15 and 53,485.11

Step by Step Solution

1. Step 1: Write the proportion equation
   76,216.55 : 105,069.15 = 53,485.11 : x
2. Step 2: Convert to fraction form
   76,216.55/105,069.15 = 53,485.11/x
3. Step 3: Cross multiply
   76,216.55x = 105,069.15 × 53,485.11
4. Step 4: Simplify right side
   76,216.55x = 5,619,635,045.36
5. Step 5: Solve for x
   x = 5,619,635,045.36/76,216.55
6. Step 6: Final answer
   x = 73,732.48