Finding the Fourth Proportional to 1,687,404.72, 2,328,258.42 and 999,292.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,687,404.72 : 2,328,258.42 = 999,292.71 : x
2. Step 2: Convert to fraction form
   1,687,404.72/2,328,258.42 = 999,292.71/x
3. Step 3: Cross multiply
   1,687,404.72x = 2,328,258.42 × 999,292.71
4. Step 4: Simplify right side
   1,687,404.72x = 2,326,611,666,102.12
5. Step 5: Solve for x
   x = 2,326,611,666,102.12/1,687,404.72
6. Step 6: Final answer
   x = 1,378,810.69