Finding the Fourth Proportional to 209,400,238.25, 288,963,007.40 and 120,028,111.37

Step by Step Solution

1. Step 1: Write the proportion equation
   209,400,238.25 : 288,963,007.40 = 120,028,111.37 : x
2. Step 2: Convert to fraction form
   209,400,238.25/288,963,007.40 = 120,028,111.37/x
3. Step 3: Cross multiply
   209,400,238.25x = 288,963,007.40 × 120,028,111.37
4. Step 4: Simplify right side
   209,400,238.25x = 34,683,684,033,506,096
5. Step 5: Solve for x
   x = 34,683,684,033,506,096/209,400,238.25
6. Step 6: Final answer
   x = 165,633,450.68