Finding the Fourth Proportional to 85,423.59, 128,181.33 and 35,538.12

Step by Step Solution

1. Step 1: Write the proportion equation
   85,423.59 : 128,181.33 = 35,538.12 : x
2. Step 2: Convert to fraction form
   85,423.59/128,181.33 = 35,538.12/x
3. Step 3: Cross multiply
   85,423.59x = 128,181.33 × 35,538.12
4. Step 4: Simplify right side
   85,423.59x = 4,555,323,487.30
5. Step 5: Solve for x
   x = 4,555,323,487.30/85,423.59
6. Step 6: Final answer
   x = 53,326.29