Finding the Fourth Proportional to 85,887.39, 128,770.72 and 37,833.20

Step by Step Solution

1. Step 1: Write the proportion equation
   85,887.39 : 128,770.72 = 37,833.20 : x
2. Step 2: Convert to fraction form
   85,887.39/128,770.72 = 37,833.20/x
3. Step 3: Cross multiply
   85,887.39x = 128,770.72 × 37,833.20
4. Step 4: Simplify right side
   85,887.39x = 4,871,808,403.90
5. Step 5: Solve for x
   x = 4,871,808,403.90/85,887.39
6. Step 6: Final answer
   x = 56,723.21