Finding the Fourth Proportional to 2,155,794.18, 2,974,867.50 and 1,238,172.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155,794.18 : 2,974,867.50 = 1,238,172.72 : x
2. Step 2: Convert to fraction form
   2,155,794.18/2,974,867.50 = 1,238,172.72/x
3. Step 3: Cross multiply
   2,155,794.18x = 2,974,867.50 × 1,238,172.72
4. Step 4: Simplify right side
   2,155,794.18x = 3,683,399,784,114.60
5. Step 5: Solve for x
   x = 3,683,399,784,114.60/2,155,794.18
6. Step 6: Final answer
   x = 1,708,604.57