Finding the Fourth Proportional to 1,296,191.96, 1,788,609.25 and 715,404.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,296,191.96 : 1,788,609.25 = 715,404.38 : x
2. Step 2: Convert to fraction form
   1,296,191.96/1,788,609.25 = 715,404.38/x
3. Step 3: Cross multiply
   1,296,191.96x = 1,788,609.25 × 715,404.38
4. Step 4: Simplify right side
   1,296,191.96x = 1,279,578,884,516.04
5. Step 5: Solve for x
   x = 1,279,578,884,516.04/1,296,191.96
6. Step 6: Final answer
   x = 987,183.17