Finding the Fourth Proportional to 1,182,734.69, 1,632,174.50 and 638,870.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,182,734.69 : 1,632,174.50 = 638,870.47 : x
2. Step 2: Convert to fraction form
   1,182,734.69/1,632,174.50 = 638,870.47/x
3. Step 3: Cross multiply
   1,182,734.69x = 1,632,174.50 × 638,870.47
4. Step 4: Simplify right side
   1,182,734.69x = 1,042,748,081,776.14
5. Step 5: Solve for x
   x = 1,042,748,081,776.14/1,182,734.69
6. Step 6: Final answer
   x = 881,641.58