Finding the Fourth Proportional to 105,123.09, 145,102.05 and 64,849.41

Step by Step Solution

1. Step 1: Write the proportion equation
   105,123.09 : 145,102.05 = 64,849.41 : x
2. Step 2: Convert to fraction form
   105,123.09/145,102.05 = 64,849.41/x
3. Step 3: Cross multiply
   105,123.09x = 145,102.05 × 64,849.41
4. Step 4: Simplify right side
   105,123.09x = 9,409,782,008.04
5. Step 5: Solve for x
   x = 9,409,782,008.04/105,123.09
6. Step 6: Final answer
   x = 89,512.04