Finding the Fourth Proportional to 103,643.56, 142,855.94 and 73,390.12

Step by Step Solution

1. Step 1: Write the proportion equation
   103,643.56 : 142,855.94 = 73,390.12 : x
2. Step 2: Convert to fraction form
   103,643.56/142,855.94 = 73,390.12/x
3. Step 3: Cross multiply
   103,643.56x = 142,855.94 × 73,390.12
4. Step 4: Simplify right side
   103,643.56x = 10,484,214,579.31
5. Step 5: Solve for x
   x = 10,484,214,579.31/103,643.56
6. Step 6: Final answer
   x = 101,156.45