Finding the Fourth Proportional to 85,085, 127,404.56 and 59,989.20

Step by Step Solution

1. Step 1: Write the proportion equation
   85,085 : 127,404.56 = 59,989.20 : x
2. Step 2: Convert to fraction form
   85,085/127,404.56 = 59,989.20/x
3. Step 3: Cross multiply
   85,085x = 127,404.56 × 59,989.20
4. Step 4: Simplify right side
   85,085x = 7,642,897,630.75
5. Step 5: Solve for x
   x = 7,642,897,630.75/85,085
6. Step 6: Final answer
   x = 89,826.62