Finding the Fourth Proportional to 152,480.34, 210,403.17 and 85,412.34

Step by Step Solution

1. Step 1: Write the proportion equation
   152,480.34 : 210,403.17 = 85,412.34 : x
2. Step 2: Convert to fraction form
   152,480.34/210,403.17 = 85,412.34/x
3. Step 3: Cross multiply
   152,480.34x = 210,403.17 × 85,412.34
4. Step 4: Simplify right side
   152,480.34x = 17,971,027,093.12
5. Step 5: Solve for x
   x = 17,971,027,093.12/152,480.34
6. Step 6: Final answer
   x = 117,857.99