Finding the Fourth Proportional to 452,345.82, 677,485.29 and 215,854.59

Step by Step Solution

1. Step 1: Write the proportion equation
   452,345.82 : 677,485.29 = 215,854.59 : x
2. Step 2: Convert to fraction form
   452,345.82/677,485.29 = 215,854.59/x
3. Step 3: Cross multiply
   452,345.82x = 677,485.29 × 215,854.59
4. Step 4: Simplify right side
   452,345.82x = 146,238,309,503.98
5. Step 5: Solve for x
   x = 146,238,309,503.98/452,345.82
6. Step 6: Final answer
   x = 323,288.74