Finding the Fourth Proportional to 1,123,089.82, 1,683,960.43 and 515,116.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123,089.82 : 1,683,960.43 = 515,116.55 : x
2. Step 2: Convert to fraction form
   1,123,089.82/1,683,960.43 = 515,116.55/x
3. Step 3: Cross multiply
   1,123,089.82x = 1,683,960.43 × 515,116.55
4. Step 4: Simplify right side
   1,123,089.82x = 867,435,887,038.12
5. Step 5: Solve for x
   x = 867,435,887,038.12/1,123,089.82
6. Step 6: Final answer
   x = 772,365.55