Finding the Fourth Proportional to 85,817.72, 128,814.06 and 59,165.48

Step by Step Solution

1. Step 1: Write the proportion equation
   85,817.72 : 128,814.06 = 59,165.48 : x
2. Step 2: Convert to fraction form
   85,817.72/128,814.06 = 59,165.48/x
3. Step 3: Cross multiply
   85,817.72x = 128,814.06 × 59,165.48
4. Step 4: Simplify right side
   85,817.72x = 7,621,345,690.65
5. Step 5: Solve for x
   x = 7,621,345,690.65/85,817.72
6. Step 6: Final answer
   x = 88,808.53