Finding the Fourth Proportional to 100,762.38, 139,055.43 and 55,443.69

Step by Step Solution

1. Step 1: Write the proportion equation
   100,762.38 : 139,055.43 = 55,443.69 : x
2. Step 2: Convert to fraction form
   100,762.38/139,055.43 = 55,443.69/x
3. Step 3: Cross multiply
   100,762.38x = 139,055.43 × 55,443.69
4. Step 4: Simplify right side
   100,762.38x = 7,709,746,361.65
5. Step 5: Solve for x
   x = 7,709,746,361.65/100,762.38
6. Step 6: Final answer
   x = 76,514.14