Finding the Fourth Proportional to 105,507.35, 145,611.84 and 60,196.50

Step by Step Solution

1. Step 1: Write the proportion equation
   105,507.35 : 145,611.84 = 60,196.50 : x
2. Step 2: Convert to fraction form
   105,507.35/145,611.84 = 60,196.50/x
3. Step 3: Cross multiply
   105,507.35x = 145,611.84 × 60,196.50
4. Step 4: Simplify right side
   105,507.35x = 8,765,323,126.56
5. Step 5: Solve for x
   x = 8,765,323,126.56/105,507.35
6. Step 6: Final answer
   x = 83,077.84