Finding the Fourth Proportional to 55,436.16, 83,082.24 and 42,240

Step by Step Solution

1. Step 1: Write the proportion equation
   55,436.16 : 83,082.24 = 42,240 : x
2. Step 2: Convert to fraction form
   55,436.16/83,082.24 = 42,240/x
3. Step 3: Cross multiply
   55,436.16x = 83,082.24 × 42,240
4. Step 4: Simplify right side
   55,436.16x = 3,509,393,817.60
5. Step 5: Solve for x
   x = 3,509,393,817.60/55,436.16
6. Step 6: Final answer
   x = 63,305.14