Finding the Fourth Proportional to 105,812.42, 145,998.33 and 61,074.50

Step by Step Solution

1. Step 1: Write the proportion equation
   105,812.42 : 145,998.33 = 61,074.50 : x
2. Step 2: Convert to fraction form
   105,812.42/145,998.33 = 61,074.50/x
3. Step 3: Cross multiply
   105,812.42x = 145,998.33 × 61,074.50
4. Step 4: Simplify right side
   105,812.42x = 8,916,775,005.59
5. Step 5: Solve for x
   x = 8,916,775,005.59/105,812.42
6. Step 6: Final answer
   x = 84,269.64