Finding the Fourth Proportional to 2,785,667.56, 4,177,970.08 and 866,602.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,785,667.56 : 4,177,970.08 = 866,602.60 : x
2. Step 2: Convert to fraction form
   2,785,667.56/4,177,970.08 = 866,602.60/x
3. Step 3: Cross multiply
   2,785,667.56x = 4,177,970.08 × 866,602.60
4. Step 4: Simplify right side
   2,785,667.56x = 3,620,639,721,438.78
5. Step 5: Solve for x
   x = 3,620,639,721,438.78/2,785,667.56
6. Step 6: Final answer
   x = 1,299,738.63