Finding the Fourth Proportional to 105,619, 145,731.54 and 62,612.06

Step by Step Solution

1. Step 1: Write the proportion equation
   105,619 : 145,731.54 = 62,612.06 : x
2. Step 2: Convert to fraction form
   105,619/145,731.54 = 62,612.06/x
3. Step 3: Cross multiply
   105,619x = 145,731.54 × 62,612.06
4. Step 4: Simplify right side
   105,619x = 9,124,551,926.37
5. Step 5: Solve for x
   x = 9,124,551,926.37/105,619
6. Step 6: Final answer
   x = 86,391.20