Finding the Fourth Proportional to 76,615.31, 105,661.83 and 53,633.36

Step by Step Solution

1. Step 1: Write the proportion equation
   76,615.31 : 105,661.83 = 53,633.36 : x
2. Step 2: Convert to fraction form
   76,615.31/105,661.83 = 53,633.36/x
3. Step 3: Cross multiply
   76,615.31x = 105,661.83 × 53,633.36
4. Step 4: Simplify right side
   76,615.31x = 5,666,998,499.87
5. Step 5: Solve for x
   x = 5,666,998,499.87/76,615.31
6. Step 6: Final answer
   x = 73,966.92