Finding the Fourth Proportional to 93,064.78, 128,371.80 and 81,156.70

Step by Step Solution

1. Step 1: Write the proportion equation
   93,064.78 : 128,371.80 = 81,156.70 : x
2. Step 2: Convert to fraction form
   93,064.78/128,371.80 = 81,156.70/x
3. Step 3: Cross multiply
   93,064.78x = 128,371.80 × 81,156.70
4. Step 4: Simplify right side
   93,064.78x = 10,418,231,661.06
5. Step 5: Solve for x
   x = 10,418,231,661.06/93,064.78
6. Step 6: Final answer
   x = 111,946.02