Finding the Fourth Proportional to 260,638.56, 390,932.73 and 83,114.10

Step by Step Solution

1. Step 1: Write the proportion equation
   260,638.56 : 390,932.73 = 83,114.10 : x
2. Step 2: Convert to fraction form
   260,638.56/390,932.73 = 83,114.10/x
3. Step 3: Cross multiply
   260,638.56x = 390,932.73 × 83,114.10
4. Step 4: Simplify right side
   260,638.56x = 32,492,022,014.49
5. Step 5: Solve for x
   x = 32,492,022,014.49/260,638.56
6. Step 6: Final answer
   x = 124,663.14