Finding the Fourth Proportional to 1,390,869.82, 1,919,271.27 and 787,257.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,390,869.82 : 1,919,271.27 = 787,257.82 : x
2. Step 2: Convert to fraction form
   1,390,869.82/1,919,271.27 = 787,257.82/x
3. Step 3: Cross multiply
   1,390,869.82x = 1,919,271.27 × 787,257.82
4. Step 4: Simplify right side
   1,390,869.82x = 1,510,961,316,008.83
5. Step 5: Solve for x
   x = 1,510,961,316,008.83/1,390,869.82
6. Step 6: Final answer
   x = 1,086,342.73