Finding the Fourth Proportional to 109,308.31, 150,915.11 and 89,213.12

Step by Step Solution

1. Step 1: Write the proportion equation
   109,308.31 : 150,915.11 = 89,213.12 : x
2. Step 2: Convert to fraction form
   109,308.31/150,915.11 = 89,213.12/x
3. Step 3: Cross multiply
   109,308.31x = 150,915.11 × 89,213.12
4. Step 4: Simplify right side
   109,308.31x = 13,463,607,372.18
5. Step 5: Solve for x
   x = 13,463,607,372.18/109,308.31
6. Step 6: Final answer
   x = 123,170.95