Finding the Fourth Proportional to 105,710.42, 145,887.18 and 69,837.60

Step by Step Solution

1. Step 1: Write the proportion equation
   105,710.42 : 145,887.18 = 69,837.60 : x
2. Step 2: Convert to fraction form
   105,710.42/145,887.18 = 69,837.60/x
3. Step 3: Cross multiply
   105,710.42x = 145,887.18 × 69,837.60
4. Step 4: Simplify right side
   105,710.42x = 10,188,410,521.97
5. Step 5: Solve for x
   x = 10,188,410,521.97/105,710.42
6. Step 6: Final answer
   x = 96,380.38