Finding the Fourth Proportional to 12,736.23, 19,101.60 and 7,990.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,736.23 : 19,101.60 = 7,990.10 : x
2. Step 2: Convert to fraction form
   12,736.23/19,101.60 = 7,990.10/x
3. Step 3: Cross multiply
   12,736.23x = 19,101.60 × 7,990.10
4. Step 4: Simplify right side
   12,736.23x = 152,623,700.25
5. Step 5: Solve for x
   x = 152,623,700.25/12,736.23
6. Step 6: Final answer
   x = 11,983.43