Finding the Fourth Proportional to 152,187, 210,018.78 and 85,119

Step by Step Solution

1. Step 1: Write the proportion equation
   152,187 : 210,018.78 = 85,119 : x
2. Step 2: Convert to fraction form
   152,187/210,018.78 = 85,119/x
3. Step 3: Cross multiply
   152,187x = 210,018.78 × 85,119
4. Step 4: Simplify right side
   152,187x = 17,876,588,534.82
5. Step 5: Solve for x
   x = 17,876,588,534.82/152,187
6. Step 6: Final answer
   x = 117,464.62