Finding the Fourth Proportional to 139,818.08, 209,837.84 and 60,987.67

Step by Step Solution

1. Step 1: Write the proportion equation
   139,818.08 : 209,837.84 = 60,987.67 : x
2. Step 2: Convert to fraction form
   139,818.08/209,837.84 = 60,987.67/x
3. Step 3: Cross multiply
   139,818.08x = 209,837.84 × 60,987.67
4. Step 4: Simplify right side
   139,818.08x = 12,797,520,109.90
5. Step 5: Solve for x
   x = 12,797,520,109.90/139,818.08
6. Step 6: Final answer
   x = 91,529.79