Finding the Fourth Proportional to 1,172,538.79, 1,614,745.73 and 1,007,865.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,172,538.79 : 1,614,745.73 = 1,007,865.89 : x
2. Step 2: Convert to fraction form
   1,172,538.79/1,614,745.73 = 1,007,865.89/x
3. Step 3: Cross multiply
   1,172,538.79x = 1,614,745.73 × 1,007,865.89
4. Step 4: Simplify right side
   1,172,538.79x = 1,627,447,142,791.38
5. Step 5: Solve for x
   x = 1,627,447,142,791.38/1,172,538.79
6. Step 6: Final answer
   x = 1,387,968.71