Finding the Fourth Proportional to 290,059.27, 435,109.88 and 121,409.98

Step by Step Solution

1. Step 1: Write the proportion equation
   290,059.27 : 435,109.88 = 121,409.98 : x
2. Step 2: Convert to fraction form
   290,059.27/435,109.88 = 121,409.98/x
3. Step 3: Cross multiply
   290,059.27x = 435,109.88 × 121,409.98
4. Step 4: Simplify right side
   290,059.27x = 52,826,681,828.60
5. Step 5: Solve for x
   x = 52,826,681,828.60/290,059.27
6. Step 6: Final answer
   x = 182,123.75