Finding the Fourth Proportional to 12,553.84, 18,818.52 and 5,978.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,553.84 : 18,818.52 = 5,978.28 : x
2. Step 2: Convert to fraction form
   12,553.84/18,818.52 = 5,978.28/x
3. Step 3: Cross multiply
   12,553.84x = 18,818.52 × 5,978.28
4. Step 4: Simplify right side
   12,553.84x = 112,502,381.75
5. Step 5: Solve for x
   x = 112,502,381.75/12,553.84
6. Step 6: Final answer
   x = 8,961.59