Finding the Fourth Proportional to 118,839.19, 163,999.37 and 65,123.05

Step by Step Solution

1. Step 1: Write the proportion equation
   118,839.19 : 163,999.37 = 65,123.05 : x
2. Step 2: Convert to fraction form
   118,839.19/163,999.37 = 65,123.05/x
3. Step 3: Cross multiply
   118,839.19x = 163,999.37 × 65,123.05
4. Step 4: Simplify right side
   118,839.19x = 10,680,139,371.83
5. Step 5: Solve for x
   x = 10,680,139,371.83/118,839.19
6. Step 6: Final answer
   x = 89,870.52