Finding the Fourth Proportional to 270,412.10, 405,656.55 and 83,404.10

Step by Step Solution

1. Step 1: Write the proportion equation
   270,412.10 : 405,656.55 = 83,404.10 : x
2. Step 2: Convert to fraction form
   270,412.10/405,656.55 = 83,404.10/x
3. Step 3: Cross multiply
   270,412.10x = 405,656.55 × 83,404.10
4. Step 4: Simplify right side
   270,412.10x = 33,833,419,461.86
5. Step 5: Solve for x
   x = 33,833,419,461.86/270,412.10
6. Step 6: Final answer
   x = 125,117.99