Finding the Fourth Proportional to 105,105.59, 145,045.64 and 62,664.12

Step by Step Solution

1. Step 1: Write the proportion equation
   105,105.59 : 145,045.64 = 62,664.12 : x
2. Step 2: Convert to fraction form
   105,105.59/145,045.64 = 62,664.12/x
3. Step 3: Cross multiply
   105,105.59x = 145,045.64 × 62,664.12
4. Step 4: Simplify right side
   105,105.59x = 9,089,157,077.12
5. Step 5: Solve for x
   x = 9,089,157,077.12/105,105.59
6. Step 6: Final answer
   x = 86,476.44