Finding the Fourth Proportional to 209,488.47, 314,261.86 and 67,338.12

Step by Step Solution

1. Step 1: Write the proportion equation
   209,488.47 : 314,261.86 = 67,338.12 : x
2. Step 2: Convert to fraction form
   209,488.47/314,261.86 = 67,338.12/x
3. Step 3: Cross multiply
   209,488.47x = 314,261.86 × 67,338.12
4. Step 4: Simplify right side
   209,488.47x = 21,161,802,840.10
5. Step 5: Solve for x
   x = 21,161,802,840.10/209,488.47
6. Step 6: Final answer
   x = 101,016.55