Finding the Fourth Proportional to 140,839.34, 210,977.60 and 84,649.10

Step by Step Solution

1. Step 1: Write the proportion equation
   140,839.34 : 210,977.60 = 84,649.10 : x
2. Step 2: Convert to fraction form
   140,839.34/210,977.60 = 84,649.10/x
3. Step 3: Cross multiply
   140,839.34x = 210,977.60 × 84,649.10
4. Step 4: Simplify right side
   140,839.34x = 17,859,062,482.03
5. Step 5: Solve for x
   x = 17,859,062,482.03/140,839.34
6. Step 6: Final answer
   x = 126,804.51