Finding the Fourth Proportional to 1,152,663.89, 1,729,078.87 and 442,691.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,152,663.89 : 1,729,078.87 = 442,691.93 : x
2. Step 2: Convert to fraction form
   1,152,663.89/1,729,078.87 = 442,691.93/x
3. Step 3: Cross multiply
   1,152,663.89x = 1,729,078.87 × 442,691.93
4. Step 4: Simplify right side
   1,152,663.89x = 765,449,266,128.53
5. Step 5: Solve for x
   x = 765,449,266,128.53/1,152,663.89
6. Step 6: Final answer
   x = 664,069.79