Finding the Fourth Proportional to 105,410.40, 145,536.53 and 62,403.77

Step by Step Solution

1. Step 1: Write the proportion equation
   105,410.40 : 145,536.53 = 62,403.77 : x
2. Step 2: Convert to fraction form
   105,410.40/145,536.53 = 62,403.77/x
3. Step 3: Cross multiply
   105,410.40x = 145,536.53 × 62,403.77
4. Step 4: Simplify right side
   105,410.40x = 9,082,027,105.02
5. Step 5: Solve for x
   x = 9,082,027,105.02/105,410.40
6. Step 6: Final answer
   x = 86,158.74