Finding the Fourth Proportional to 290,023.31, 435,034.15 and 79,661.45

Step by Step Solution

1. Step 1: Write the proportion equation
   290,023.31 : 435,034.15 = 79,661.45 : x
2. Step 2: Convert to fraction form
   290,023.31/435,034.15 = 79,661.45/x
3. Step 3: Cross multiply
   290,023.31x = 435,034.15 × 79,661.45
4. Step 4: Simplify right side
   290,023.31x = 34,655,451,188.52
5. Step 5: Solve for x
   x = 34,655,451,188.52/290,023.31
6. Step 6: Final answer
   x = 119,491.95