Finding the Fourth Proportional to 105,424.72, 145,538.76 and 60,704.08

Step by Step Solution

1. Step 1: Write the proportion equation
   105,424.72 : 145,538.76 = 60,704.08 : x
2. Step 2: Convert to fraction form
   105,424.72/145,538.76 = 60,704.08/x
3. Step 3: Cross multiply
   105,424.72x = 145,538.76 × 60,704.08
4. Step 4: Simplify right side
   105,424.72x = 8,834,796,530.14
5. Step 5: Solve for x
   x = 8,834,796,530.14/105,424.72
6. Step 6: Final answer
   x = 83,801.94