Finding the Fourth Proportional to 105,092.30, 145,021.64 and 59,764.16

Step by Step Solution

1. Step 1: Write the proportion equation
   105,092.30 : 145,021.64 = 59,764.16 : x
2. Step 2: Convert to fraction form
   105,092.30/145,021.64 = 59,764.16/x
3. Step 3: Cross multiply
   105,092.30x = 145,021.64 × 59,764.16
4. Step 4: Simplify right side
   105,092.30x = 8,667,096,496.42
5. Step 5: Solve for x
   x = 8,667,096,496.42/105,092.30
6. Step 6: Final answer
   x = 82,471.28