Finding the Fourth Proportional to 1,006,463.72, 1,389,434.28 and 776,504.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,006,463.72 : 1,389,434.28 = 776,504.72 : x
2. Step 2: Convert to fraction form
   1,006,463.72/1,389,434.28 = 776,504.72/x
3. Step 3: Cross multiply
   1,006,463.72x = 1,389,434.28 × 776,504.72
4. Step 4: Simplify right side
   1,006,463.72x = 1,078,902,276,549.80
5. Step 5: Solve for x
   x = 1,078,902,276,549.80/1,006,463.72
6. Step 6: Final answer
   x = 1,071,973.34