Finding the Fourth Proportional to 290,048.67, 435,084.83 and 138,167.69

Step by Step Solution

1. Step 1: Write the proportion equation
   290,048.67 : 435,084.83 = 138,167.69 : x
2. Step 2: Convert to fraction form
   290,048.67/435,084.83 = 138,167.69/x
3. Step 3: Cross multiply
   290,048.67x = 435,084.83 × 138,167.69
4. Step 4: Simplify right side
   290,048.67x = 60,114,663,048.88
5. Step 5: Solve for x
   x = 60,114,663,048.88/290,048.67
6. Step 6: Final answer
   x = 207,257.16