Finding the Fourth Proportional to 1,290,667.54, 1,781,164.49 and 709,915.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,290,667.54 : 1,781,164.49 = 709,915.24 : x
2. Step 2: Convert to fraction form
   1,290,667.54/1,781,164.49 = 709,915.24/x
3. Step 3: Cross multiply
   1,290,667.54x = 1,781,164.49 × 709,915.24
4. Step 4: Simplify right side
   1,290,667.54x = 1,264,475,812,848.25
5. Step 5: Solve for x
   x = 1,264,475,812,848.25/1,290,667.54
6. Step 6: Final answer
   x = 979,706.84