Finding the Fourth Proportional to 1,105,588.56, 1,658,528.76 and 385,943.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105,588.56 : 1,658,528.76 = 385,943.22 : x
2. Step 2: Convert to fraction form
   1,105,588.56/1,658,528.76 = 385,943.22/x
3. Step 3: Cross multiply
   1,105,588.56x = 1,658,528.76 × 385,943.22
4. Step 4: Simplify right side
   1,105,588.56x = 640,097,930,097.01
5. Step 5: Solve for x
   x = 640,097,930,097.01/1,105,588.56
6. Step 6: Final answer
   x = 578,965.77