Finding the Fourth Proportional to 152,189, 210,021.54 and 85,121

Step by Step Solution

1. Step 1: Write the proportion equation
   152,189 : 210,021.54 = 85,121 : x
2. Step 2: Convert to fraction form
   152,189/210,021.54 = 85,121/x
3. Step 3: Cross multiply
   152,189x = 210,021.54 × 85,121
4. Step 4: Simplify right side
   152,189x = 17,877,243,506.34
5. Step 5: Solve for x
   x = 17,877,243,506.34/152,189
6. Step 6: Final answer
   x = 117,467.38