Finding the Fourth Proportional to 209,287,188.63, 288,843,822.33 and 120,014,068.71

Step by Step Solution

1. Step 1: Write the proportion equation
   209,287,188.63 : 288,843,822.33 = 120,014,068.71 : x
2. Step 2: Convert to fraction form
   209,287,188.63/288,843,822.33 = 120,014,068.71/x
3. Step 3: Cross multiply
   209,287,188.63x = 288,843,822.33 × 120,014,068.71
4. Step 4: Simplify right side
   209,287,188.63x = 34,665,322,339,571,648
5. Step 5: Solve for x
   x = 34,665,322,339,571,648/209,287,188.63
6. Step 6: Final answer
   x = 165,635,185.63