Finding the Fourth Proportional to 85,600.83, 128,346.57 and 41,139.12

Step by Step Solution

1. Step 1: Write the proportion equation
   85,600.83 : 128,346.57 = 41,139.12 : x
2. Step 2: Convert to fraction form
   85,600.83/128,346.57 = 41,139.12/x
3. Step 3: Cross multiply
   85,600.83x = 128,346.57 × 41,139.12
4. Step 4: Simplify right side
   85,600.83x = 5,280,064,944.82
5. Step 5: Solve for x
   x = 5,280,064,944.82/85,600.83
6. Step 6: Final answer
   x = 61,682.40