Finding the Fourth Proportional to 209,510.77, 289,131.42 and 118,870.55

Step by Step Solution

1. Step 1: Write the proportion equation
   209,510.77 : 289,131.42 = 118,870.55 : x
2. Step 2: Convert to fraction form
   209,510.77/289,131.42 = 118,870.55/x
3. Step 3: Cross multiply
   209,510.77x = 289,131.42 × 118,870.55
4. Step 4: Simplify right side
   209,510.77x = 34,369,210,917.68
5. Step 5: Solve for x
   x = 34,369,210,917.68/209,510.77
6. Step 6: Final answer
   x = 164,045.08