Finding the Fourth Proportional to 40,889.98, 61,322.01 and 13,181.50

Step by Step Solution

1. Step 1: Write the proportion equation
   40,889.98 : 61,322.01 = 13,181.50 : x
2. Step 2: Convert to fraction form
   40,889.98/61,322.01 = 13,181.50/x
3. Step 3: Cross multiply
   40,889.98x = 61,322.01 × 13,181.50
4. Step 4: Simplify right side
   40,889.98x = 808,316,074.82
5. Step 5: Solve for x
   x = 808,316,074.82/40,889.98
6. Step 6: Final answer
   x = 19,768.07