Finding the Fourth Proportional to 402,100.09, 554,429.33 and 299,948.22

Step by Step Solution

1. Step 1: Write the proportion equation
   402,100.09 : 554,429.33 = 299,948.22 : x
2. Step 2: Convert to fraction form
   402,100.09/554,429.33 = 299,948.22/x
3. Step 3: Cross multiply
   402,100.09x = 554,429.33 × 299,948.22
4. Step 4: Simplify right side
   402,100.09x = 166,300,090,649.29
5. Step 5: Solve for x
   x = 166,300,090,649.29/402,100.09
6. Step 6: Final answer
   x = 413,578.84