Finding the Fourth Proportional to 155,925, 215,176.50 and 85,269

Step by Step Solution

1. Step 1: Write the proportion equation
   155,925 : 215,176.50 = 85,269 : x
2. Step 2: Convert to fraction form
   155,925/215,176.50 = 85,269/x
3. Step 3: Cross multiply
   155,925x = 215,176.50 × 85,269
4. Step 4: Simplify right side
   155,925x = 18,347,884,978.50
5. Step 5: Solve for x
   x = 18,347,884,978.50/155,925
6. Step 6: Final answer
   x = 117,671.22