Finding the Fourth Proportional to 30,887.06, 42,628.72 and 19,557.61

Step by Step Solution

1. Step 1: Write the proportion equation
   30,887.06 : 42,628.72 = 19,557.61 : x
2. Step 2: Convert to fraction form
   30,887.06/42,628.72 = 19,557.61/x
3. Step 3: Cross multiply
   30,887.06x = 42,628.72 × 19,557.61
4. Step 4: Simplify right side
   30,887.06x = 833,715,725.09
5. Step 5: Solve for x
   x = 833,715,725.09/30,887.06
6. Step 6: Final answer
   x = 26,992.39