Finding the Fourth Proportional to 11,992.31, 17,972.01 and 7,612.84

Step by Step Solution

1. Step 1: Write the proportion equation
   11,992.31 : 17,972.01 = 7,612.84 : x
2. Step 2: Convert to fraction form
   11,992.31/17,972.01 = 7,612.84/x
3. Step 3: Cross multiply
   11,992.31x = 17,972.01 × 7,612.84
4. Step 4: Simplify right side
   11,992.31x = 136,818,036.61
5. Step 5: Solve for x
   x = 136,818,036.61/11,992.31
6. Step 6: Final answer
   x = 11,408.81