Finding the Fourth Proportional to 290,090.18, 435,061.46 and 90,373.34

Step by Step Solution

1. Step 1: Write the proportion equation
   290,090.18 : 435,061.46 = 90,373.34 : x
2. Step 2: Convert to fraction form
   290,090.18/435,061.46 = 90,373.34/x
3. Step 3: Cross multiply
   290,090.18x = 435,061.46 × 90,373.34
4. Step 4: Simplify right side
   290,090.18x = 39,317,958,559.06
5. Step 5: Solve for x
   x = 39,317,958,559.06/290,090.18
6. Step 6: Final answer
   x = 135,537.02