Finding the Fourth Proportional to 1,353,081.88, 1,866,408.06 and 870,276.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,353,081.88 : 1,866,408.06 = 870,276.76 : x
2. Step 2: Convert to fraction form
   1,353,081.88/1,866,408.06 = 870,276.76/x
3. Step 3: Cross multiply
   1,353,081.88x = 1,866,408.06 × 870,276.76
4. Step 4: Simplify right side
   1,353,081.88x = 1,624,291,559,294.69
5. Step 5: Solve for x
   x = 1,624,291,559,294.69/1,353,081.88
6. Step 6: Final answer
   x = 1,200,438.48