Finding the Fourth Proportional to 99,823.28, 137,756.76 and 55,111.28

Step by Step Solution

1. Step 1: Write the proportion equation
   99,823.28 : 137,756.76 = 55,111.28 : x
2. Step 2: Convert to fraction form
   99,823.28/137,756.76 = 55,111.28/x
3. Step 3: Cross multiply
   99,823.28x = 137,756.76 × 55,111.28
4. Step 4: Simplify right side
   99,823.28x = 7,591,951,372.25
5. Step 5: Solve for x
   x = 7,591,951,372.25/99,823.28
6. Step 6: Final answer
   x = 76,053.92