Finding the Fourth Proportional to 1,386,170.72, 1,912,915.59 and 782,558.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,386,170.72 : 1,912,915.59 = 782,558.72 : x
2. Step 2: Convert to fraction form
   1,386,170.72/1,912,915.59 = 782,558.72/x
3. Step 3: Cross multiply
   1,386,170.72x = 1,912,915.59 × 782,558.72
4. Step 4: Simplify right side
   1,386,170.72x = 1,496,968,774,654.60
5. Step 5: Solve for x
   x = 1,496,968,774,654.60/1,386,170.72
6. Step 6: Final answer
   x = 1,079,931.03