Finding the Fourth Proportional to 105,428.82, 145,499.67 and 60,107.88

Step by Step Solution

1. Step 1: Write the proportion equation
   105,428.82 : 145,499.67 = 60,107.88 : x
2. Step 2: Convert to fraction form
   105,428.82/145,499.67 = 60,107.88/x
3. Step 3: Cross multiply
   105,428.82x = 145,499.67 × 60,107.88
4. Step 4: Simplify right side
   105,428.82x = 8,745,676,704.40
5. Step 5: Solve for x
   x = 8,745,676,704.40/105,428.82
6. Step 6: Final answer
   x = 82,953.38