Finding the Fourth Proportional to 105,215, 145,196.70 and 60,503

Step by Step Solution

1. Step 1: Write the proportion equation
   105,215 : 145,196.70 = 60,503 : x
2. Step 2: Convert to fraction form
   105,215/145,196.70 = 60,503/x
3. Step 3: Cross multiply
   105,215x = 145,196.70 × 60,503
4. Step 4: Simplify right side
   105,215x = 8,784,835,940.10
5. Step 5: Solve for x
   x = 8,784,835,940.10/105,215
6. Step 6: Final answer
   x = 83,494.14