Finding the Fourth Proportional to 30,887.47, 42,602.16 and 19,558.81

Step by Step Solution

1. Step 1: Write the proportion equation
   30,887.47 : 42,602.16 = 19,558.81 : x
2. Step 2: Convert to fraction form
   30,887.47/42,602.16 = 19,558.81/x
3. Step 3: Cross multiply
   30,887.47x = 42,602.16 × 19,558.81
4. Step 4: Simplify right side
   30,887.47x = 833,247,553.03
5. Step 5: Solve for x
   x = 833,247,553.03/30,887.47
6. Step 6: Final answer
   x = 26,976.88