Finding the Fourth Proportional to 1,148,039.98, 1,584,370.89 and 638,743.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,148,039.98 : 1,584,370.89 = 638,743.42 : x
2. Step 2: Convert to fraction form
   1,148,039.98/1,584,370.89 = 638,743.42/x
3. Step 3: Cross multiply
   1,148,039.98x = 1,584,370.89 × 638,743.42
4. Step 4: Simplify right side
   1,148,039.98x = 1,012,006,480,827.04
5. Step 5: Solve for x
   x = 1,012,006,480,827.04/1,148,039.98
6. Step 6: Final answer
   x = 881,508.05