Finding the Fourth Proportional to 1,290,667.28, 1,781,164.12 and 709,914.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,290,667.28 : 1,781,164.12 = 709,914.96 : x
2. Step 2: Convert to fraction form
   1,290,667.28/1,781,164.12 = 709,914.96/x
3. Step 3: Cross multiply
   1,290,667.28x = 1,781,164.12 × 709,914.96
4. Step 4: Simplify right side
   1,290,667.28x = 1,264,475,055,003.24
5. Step 5: Solve for x
   x = 1,264,475,055,003.24/1,290,667.28
6. Step 6: Final answer
   x = 979,706.45