Finding the Fourth Proportional to 889,196.50, 1,227,091.24 and 486,788.50

Step by Step Solution

1. Step 1: Write the proportion equation
   889,196.50 : 1,227,091.24 = 486,788.50 : x
2. Step 2: Convert to fraction form
   889,196.50/1,227,091.24 = 486,788.50/x
3. Step 3: Cross multiply
   889,196.50x = 1,227,091.24 × 486,788.50
4. Step 4: Simplify right side
   889,196.50x = 597,333,904,082.74
5. Step 5: Solve for x
   x = 597,333,904,082.74/889,196.50
6. Step 6: Final answer
   x = 671,768.17