Finding the Fourth Proportional to 102,679.21, 154,018.71 and 38,649.31

Step by Step Solution

1. Step 1: Write the proportion equation
   102,679.21 : 154,018.71 = 38,649.31 : x
2. Step 2: Convert to fraction form
   102,679.21/154,018.71 = 38,649.31/x
3. Step 3: Cross multiply
   102,679.21x = 154,018.71 × 38,649.31
4. Step 4: Simplify right side
   102,679.21x = 5,952,716,868.59
5. Step 5: Solve for x
   x = 5,952,716,868.59/102,679.21
6. Step 6: Final answer
   x = 57,973.93