Finding the Fourth Proportional to 1,375,928.10, 2,064,086.55 and 429,200.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,375,928.10 : 2,064,086.55 = 429,200.10 : x
2. Step 2: Convert to fraction form
   1,375,928.10/2,064,086.55 = 429,200.10/x
3. Step 3: Cross multiply
   1,375,928.10x = 2,064,086.55 × 429,200.10
4. Step 4: Simplify right side
   1,375,928.10x = 885,906,153,668.66
5. Step 5: Solve for x
   x = 885,906,153,668.66/1,375,928.10
6. Step 6: Final answer
   x = 643,860.79