Finding the Fourth Proportional to 76,617.31, 105,664.59 and 53,635.36

Step by Step Solution

1. Step 1: Write the proportion equation
   76,617.31 : 105,664.59 = 53,635.36 : x
2. Step 2: Convert to fraction form
   76,617.31/105,664.59 = 53,635.36/x
3. Step 3: Cross multiply
   76,617.31x = 105,664.59 × 53,635.36
4. Step 4: Simplify right side
   76,617.31x = 5,667,358,323.90
5. Step 5: Solve for x
   x = 5,667,358,323.90/76,617.31
6. Step 6: Final answer
   x = 73,969.69