Finding the Fourth Proportional to 113,915.28, 157,222.27 and 66,196.30

Step by Step Solution

1. Step 1: Write the proportion equation
   113,915.28 : 157,222.27 = 66,196.30 : x
2. Step 2: Convert to fraction form
   113,915.28/157,222.27 = 66,196.30/x
3. Step 3: Cross multiply
   113,915.28x = 157,222.27 × 66,196.30
4. Step 4: Simplify right side
   113,915.28x = 10,407,532,551.60
5. Step 5: Solve for x
   x = 10,407,532,551.60/113,915.28
6. Step 6: Final answer
   x = 91,362.05