Finding the Fourth Proportional to 1,319,857.72, 1,821,404.82 and 716,245.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,319,857.72 : 1,821,404.82 = 716,245.72 : x
2. Step 2: Convert to fraction form
   1,319,857.72/1,821,404.82 = 716,245.72/x
3. Step 3: Cross multiply
   1,319,857.72x = 1,821,404.82 × 716,245.72
4. Step 4: Simplify right side
   1,319,857.72x = 1,304,573,406,712.37
5. Step 5: Solve for x
   x = 1,304,573,406,712.37/1,319,857.72
6. Step 6: Final answer
   x = 988,419.73