Finding the Fourth Proportional to 105,430.44, 145,490.37 and 60,123

Step by Step Solution

1. Step 1: Write the proportion equation
   105,430.44 : 145,490.37 = 60,123 : x
2. Step 2: Convert to fraction form
   105,430.44/145,490.37 = 60,123/x
3. Step 3: Cross multiply
   105,430.44x = 145,490.37 × 60,123
4. Step 4: Simplify right side
   105,430.44x = 8,747,317,515.51
5. Step 5: Solve for x
   x = 8,747,317,515.51/105,430.44
6. Step 6: Final answer
   x = 82,967.67