Finding the Fourth Proportional to 35,188.01, 52,774.72 and 12,986.21

Step by Step Solution

1. Step 1: Write the proportion equation
   35,188.01 : 52,774.72 = 12,986.21 : x
2. Step 2: Convert to fraction form
   35,188.01/52,774.72 = 12,986.21/x
3. Step 3: Cross multiply
   35,188.01x = 52,774.72 × 12,986.21
4. Step 4: Simplify right side
   35,188.01x = 685,343,596.61
5. Step 5: Solve for x
   x = 685,343,596.61/35,188.01
6. Step 6: Final answer
   x = 19,476.62