Finding the Fourth Proportional to 91,096.16, 125,799.56 and 86,126.20

Step by Step Solution

1. Step 1: Write the proportion equation
   91,096.16 : 125,799.56 = 86,126.20 : x
2. Step 2: Convert to fraction form
   91,096.16/125,799.56 = 86,126.20/x
3. Step 3: Cross multiply
   91,096.16x = 125,799.56 × 86,126.20
4. Step 4: Simplify right side
   91,096.16x = 10,834,638,064.47
5. Step 5: Solve for x
   x = 10,834,638,064.47/91,096.16
6. Step 6: Final answer
   x = 118,936.28