Finding the Fourth Proportional to 152,999, 211,158.42 and 85,931

Step by Step Solution

1. Step 1: Write the proportion equation
   152,999 : 211,158.42 = 85,931 : x
2. Step 2: Convert to fraction form
   152,999/211,158.42 = 85,931/x
3. Step 3: Cross multiply
   152,999x = 211,158.42 × 85,931
4. Step 4: Simplify right side
   152,999x = 18,145,054,189.02
5. Step 5: Solve for x
   x = 18,145,054,189.02/152,999
6. Step 6: Final answer
   x = 118,595.90