Finding the Fourth Proportional to 30,902.69, 42,630.01 and 19,553.06

Step by Step Solution

1. Step 1: Write the proportion equation
   30,902.69 : 42,630.01 = 19,553.06 : x
2. Step 2: Convert to fraction form
   30,902.69/42,630.01 = 19,553.06/x
3. Step 3: Cross multiply
   30,902.69x = 42,630.01 × 19,553.06
4. Step 4: Simplify right side
   30,902.69x = 833,546,881.30
5. Step 5: Solve for x
   x = 833,546,881.30/30,902.69
6. Step 6: Final answer
   x = 26,973.28