Finding the Fourth Proportional to 290,091.83, 435,158.71 and 121,442.54

Step by Step Solution

1. Step 1: Write the proportion equation
   290,091.83 : 435,158.71 = 121,442.54 : x
2. Step 2: Convert to fraction form
   290,091.83/435,158.71 = 121,442.54/x
3. Step 3: Cross multiply
   290,091.83x = 435,158.71 × 121,442.54
4. Step 4: Simplify right side
   290,091.83x = 52,846,779,829.81
5. Step 5: Solve for x
   x = 52,846,779,829.81/290,091.83
6. Step 6: Final answer
   x = 182,172.59