Finding the Fourth Proportional to 105,666.72, 145,575 and 73,785.12

Step by Step Solution

1. Step 1: Write the proportion equation
   105,666.72 : 145,575 = 73,785.12 : x
2. Step 2: Convert to fraction form
   105,666.72/145,575 = 73,785.12/x
3. Step 3: Cross multiply
   105,666.72x = 145,575 × 73,785.12
4. Step 4: Simplify right side
   105,666.72x = 10,741,268,844
5. Step 5: Solve for x
   x = 10,741,268,844/105,666.72
6. Step 6: Final answer
   x = 101,652.34