Finding the Fourth Proportional to 85,720.72, 128,601.60 and 35,773

Step by Step Solution

1. Step 1: Write the proportion equation
   85,720.72 : 128,601.60 = 35,773 : x
2. Step 2: Convert to fraction form
   85,720.72/128,601.60 = 35,773/x
3. Step 3: Cross multiply
   85,720.72x = 128,601.60 × 35,773
4. Step 4: Simplify right side
   85,720.72x = 4,600,465,036.80
5. Step 5: Solve for x
   x = 4,600,465,036.80/85,720.72
6. Step 6: Final answer
   x = 53,668.06