Finding the Fourth Proportional to 1,307,072.72, 1,960,941.71 and 767,785.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,307,072.72 : 1,960,941.71 = 767,785.05 : x
2. Step 2: Convert to fraction form
   1,307,072.72/1,960,941.71 = 767,785.05/x
3. Step 3: Cross multiply
   1,307,072.72x = 1,960,941.71 × 767,785.05
4. Step 4: Simplify right side
   1,307,072.72x = 1,505,581,728,859.44
5. Step 5: Solve for x
   x = 1,505,581,728,859.44/1,307,072.72
6. Step 6: Final answer
   x = 1,151,872.96