Finding the Fourth Proportional to 290,404.01, 435,627.89 and 80,040.13

Step by Step Solution

1. Step 1: Write the proportion equation
   290,404.01 : 435,627.89 = 80,040.13 : x
2. Step 2: Convert to fraction form
   290,404.01/435,627.89 = 80,040.13/x
3. Step 3: Cross multiply
   290,404.01x = 435,627.89 × 80,040.13
4. Step 4: Simplify right side
   290,404.01x = 34,867,710,368.89
5. Step 5: Solve for x
   x = 34,867,710,368.89/290,404.01
6. Step 6: Final answer
   x = 120,066.22