Finding the Fourth Proportional to 359,761, 539,667.66 and 138,145

Step by Step Solution

1. Step 1: Write the proportion equation
   359,761 : 539,667.66 = 138,145 : x
2. Step 2: Convert to fraction form
   359,761/539,667.66 = 138,145/x
3. Step 3: Cross multiply
   359,761x = 539,667.66 × 138,145
4. Step 4: Simplify right side
   359,761x = 74,552,388,890.70
5. Step 5: Solve for x
   x = 74,552,388,890.70/359,761
6. Step 6: Final answer
   x = 207,227.55