Finding the Fourth Proportional to 359,688.69, 539,692.20 and 188,870.22

Step by Step Solution

1. Step 1: Write the proportion equation
   359,688.69 : 539,692.20 = 188,870.22 : x
2. Step 2: Convert to fraction form
   359,688.69/539,692.20 = 188,870.22/x
3. Step 3: Cross multiply
   359,688.69x = 539,692.20 × 188,870.22
4. Step 4: Simplify right side
   359,688.69x = 101,931,784,546.28
5. Step 5: Solve for x
   x = 101,931,784,546.28/359,688.69
6. Step 6: Final answer
   x = 283,388.91