Finding the Fourth Proportional to 152,109.74, 209,912.83 and 84,123.20

Step by Step Solution

1. Step 1: Write the proportion equation
   152,109.74 : 209,912.83 = 84,123.20 : x
2. Step 2: Convert to fraction form
   152,109.74/209,912.83 = 84,123.20/x
3. Step 3: Cross multiply
   152,109.74x = 209,912.83 × 84,123.20
4. Step 4: Simplify right side
   152,109.74x = 17,658,537,720.78
5. Step 5: Solve for x
   x = 17,658,537,720.78/152,109.74
6. Step 6: Final answer
   x = 116,090.78