Finding the Fourth Proportional to 92,845.56, 128,160 and 55,119.72

Step by Step Solution

1. Step 1: Write the proportion equation
   92,845.56 : 128,160 = 55,119.72 : x
2. Step 2: Convert to fraction form
   92,845.56/128,160 = 55,119.72/x
3. Step 3: Cross multiply
   92,845.56x = 128,160 × 55,119.72
4. Step 4: Simplify right side
   92,845.56x = 7,064,143,315.20
5. Step 5: Solve for x
   x = 7,064,143,315.20/92,845.56
6. Step 6: Final answer
   x = 76,084.88