Finding the Fourth Proportional to 99,180.27, 136,868.00 and 53,857.40

Step by Step Solution

1. Step 1: Write the proportion equation
   99,180.27 : 136,868.00 = 53,857.40 : x
2. Step 2: Convert to fraction form
   99,180.27/136,868.00 = 53,857.40/x
3. Step 3: Cross multiply
   99,180.27x = 136,868.00 × 53,857.40
4. Step 4: Simplify right side
   99,180.27x = 7,371,353,669.57
5. Step 5: Solve for x
   x = 7,371,353,669.57/99,180.27
6. Step 6: Final answer
   x = 74,322.78