Finding the Fourth Proportional to 139,459.32, 209,071.08 and 60,514.20

Step by Step Solution

1. Step 1: Write the proportion equation
   139,459.32 : 209,071.08 = 60,514.20 : x
2. Step 2: Convert to fraction form
   139,459.32/209,071.08 = 60,514.20/x
3. Step 3: Cross multiply
   139,459.32x = 209,071.08 × 60,514.20
4. Step 4: Simplify right side
   139,459.32x = 12,651,769,149.34
5. Step 5: Solve for x
   x = 12,651,769,149.34/139,459.32
6. Step 6: Final answer
   x = 90,720.14