Finding the Fourth Proportional to 621,127.89, 857,151.32 and 349,196.99

Step by Step Solution

1. Step 1: Write the proportion equation
   621,127.89 : 857,151.32 = 349,196.99 : x
2. Step 2: Convert to fraction form
   621,127.89/857,151.32 = 349,196.99/x
3. Step 3: Cross multiply
   621,127.89x = 857,151.32 × 349,196.99
4. Step 4: Simplify right side
   621,127.89x = 299,314,654,886.79
5. Step 5: Solve for x
   x = 299,314,654,886.79/621,127.89
6. Step 6: Final answer
   x = 481,888.93