Finding the Fourth Proportional to 152,188, 210,020.16 and 85,120

Step by Step Solution

1. Step 1: Write the proportion equation
   152,188 : 210,020.16 = 85,120 : x
2. Step 2: Convert to fraction form
   152,188/210,020.16 = 85,120/x
3. Step 3: Cross multiply
   152,188x = 210,020.16 × 85,120
4. Step 4: Simplify right side
   152,188x = 17,876,916,019.20
5. Step 5: Solve for x
   x = 17,876,916,019.20/152,188
6. Step 6: Final answer
   x = 117,466.00