Finding the Fourth Proportional to 1,046,128.90, 1,569,339.15 and 447,085.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,046,128.90 : 1,569,339.15 = 447,085.30 : x
2. Step 2: Convert to fraction form
   1,046,128.90/1,569,339.15 = 447,085.30/x
3. Step 3: Cross multiply
   1,046,128.90x = 1,569,339.15 × 447,085.30
4. Step 4: Simplify right side
   1,046,128.90x = 701,628,464,679.50
5. Step 5: Solve for x
   x = 701,628,464,679.50/1,046,128.90
6. Step 6: Final answer
   x = 670,690.26