Finding the Fourth Proportional to 709,826, 1,064,214.12 and 429,280.88

Step by Step Solution

1. Step 1: Write the proportion equation
   709,826 : 1,064,214.12 = 429,280.88 : x
2. Step 2: Convert to fraction form
   709,826/1,064,214.12 = 429,280.88/x
3. Step 3: Cross multiply
   709,826x = 1,064,214.12 × 429,280.88
4. Step 4: Simplify right side
   709,826x = 456,846,773,942.03
5. Step 5: Solve for x
   x = 456,846,773,942.03/709,826
6. Step 6: Final answer
   x = 643,603.89