Finding the Fourth Proportional to 545,144.82, 817,884.72 and 279,092.10

Step by Step Solution

1. Step 1: Write the proportion equation
   545,144.82 : 817,884.72 = 279,092.10 : x
2. Step 2: Convert to fraction form
   545,144.82/817,884.72 = 279,092.10/x
3. Step 3: Cross multiply
   545,144.82x = 817,884.72 × 279,092.10
4. Step 4: Simplify right side
   545,144.82x = 228,265,164,062.71
5. Step 5: Solve for x
   x = 228,265,164,062.71/545,144.82
6. Step 6: Final answer
   x = 418,723.90