Finding the Fourth Proportional to 105,192.21, 145,145.71 and 59,867.50

Step by Step Solution

1. Step 1: Write the proportion equation
   105,192.21 : 145,145.71 = 59,867.50 : x
2. Step 2: Convert to fraction form
   105,192.21/145,145.71 = 59,867.50/x
3. Step 3: Cross multiply
   105,192.21x = 145,145.71 × 59,867.50
4. Step 4: Simplify right side
   105,192.21x = 8,689,510,793.43
5. Step 5: Solve for x
   x = 8,689,510,793.43/105,192.21
6. Step 6: Final answer
   x = 82,606.03