Finding the Fourth Proportional to 1,123,997.74, 1,685,208.06 and 413,934.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123,997.74 : 1,685,208.06 = 413,934.72 : x
2. Step 2: Convert to fraction form
   1,123,997.74/1,685,208.06 = 413,934.72/x
3. Step 3: Cross multiply
   1,123,997.74x = 1,685,208.06 × 413,934.72
4. Step 4: Simplify right side
   1,123,997.74x = 697,566,126,457.84
5. Step 5: Solve for x
   x = 697,566,126,457.84/1,123,997.74
6. Step 6: Final answer
   x = 620,611.68