Finding the Fourth Proportional to 690,404.10, 1,034,279.37 and 423,385.98

Step by Step Solution

1. Step 1: Write the proportion equation
   690,404.10 : 1,034,279.37 = 423,385.98 : x
2. Step 2: Convert to fraction form
   690,404.10/1,034,279.37 = 423,385.98/x
3. Step 3: Cross multiply
   690,404.10x = 1,034,279.37 × 423,385.98
4. Step 4: Simplify right side
   690,404.10x = 437,899,384,661.23
5. Step 5: Solve for x
   x = 437,899,384,661.23/690,404.10
6. Step 6: Final answer
   x = 634,265.33