Finding the Fourth Proportional to 2,580,665.91, 3,870,748.50 and 783,564.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,580,665.91 : 3,870,748.50 = 783,564.98 : x
2. Step 2: Convert to fraction form
   2,580,665.91/3,870,748.50 = 783,564.98/x
3. Step 3: Cross multiply
   2,580,665.91x = 3,870,748.50 × 783,564.98
4. Step 4: Simplify right side
   2,580,665.91x = 3,032,982,970,987.53
5. Step 5: Solve for x
   x = 3,032,982,970,987.53/2,580,665.91
6. Step 6: Final answer
   x = 1,175,271.45