Finding the Fourth Proportional to 76,796.72, 106,021.28 and 53,051.12

Step by Step Solution

1. Step 1: Write the proportion equation
   76,796.72 : 106,021.28 = 53,051.12 : x
2. Step 2: Convert to fraction form
   76,796.72/106,021.28 = 53,051.12/x
3. Step 3: Cross multiply
   76,796.72x = 106,021.28 × 53,051.12
4. Step 4: Simplify right side
   76,796.72x = 5,624,547,647.83
5. Step 5: Solve for x
   x = 5,624,547,647.83/76,796.72
6. Step 6: Final answer
   x = 73,239.43