Finding the Fourth Proportional to 1,636,308.10, 2,454,462.15 and 438,415.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,636,308.10 : 2,454,462.15 = 438,415.30 : x
2. Step 2: Convert to fraction form
   1,636,308.10/2,454,462.15 = 438,415.30/x
3. Step 3: Cross multiply
   1,636,308.10x = 2,454,462.15 × 438,415.30
4. Step 4: Simplify right side
   1,636,308.10x = 1,076,073,759,830.89
5. Step 5: Solve for x
   x = 1,076,073,759,830.89/1,636,308.10
6. Step 6: Final answer
   x = 657,622.95