Finding the Fourth Proportional to 12,047.31, 17,938.68 and 11,915.01

Step by Step Solution

1. Step 1: Write the proportion equation
   12,047.31 : 17,938.68 = 11,915.01 : x
2. Step 2: Convert to fraction form
   12,047.31/17,938.68 = 11,915.01/x
3. Step 3: Cross multiply
   12,047.31x = 17,938.68 × 11,915.01
4. Step 4: Simplify right side
   12,047.31x = 213,739,551.59
5. Step 5: Solve for x
   x = 213,739,551.59/12,047.31
6. Step 6: Final answer
   x = 17,741.68