Finding the Fourth Proportional to 1,189,123.62, 1,783,957.86 and 515,317.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,189,123.62 : 1,783,957.86 = 515,317.98 : x
2. Step 2: Convert to fraction form
   1,189,123.62/1,783,957.86 = 515,317.98/x
3. Step 3: Cross multiply
   1,189,123.62x = 1,783,957.86 × 515,317.98
4. Step 4: Simplify right side
   1,189,123.62x = 919,305,560,820.32
5. Step 5: Solve for x
   x = 919,305,560,820.32/1,189,123.62
6. Step 6: Final answer
   x = 773,095.03