Finding the Fourth Proportional to 152,465, 210,401.70 and 85,397

Step by Step Solution

1. Step 1: Write the proportion equation
   152,465 : 210,401.70 = 85,397 : x
2. Step 2: Convert to fraction form
   152,465/210,401.70 = 85,397/x
3. Step 3: Cross multiply
   152,465x = 210,401.70 × 85,397
4. Step 4: Simplify right side
   152,465x = 17,967,673,974.90
5. Step 5: Solve for x
   x = 17,967,673,974.90/152,465
6. Step 6: Final answer
   x = 117,847.86