Finding the Fourth Proportional to 138,086.07, 190,494.50 and 87,075.51

Step by Step Solution

1. Step 1: Write the proportion equation
   138,086.07 : 190,494.50 = 87,075.51 : x
2. Step 2: Convert to fraction form
   138,086.07/190,494.50 = 87,075.51/x
3. Step 3: Cross multiply
   138,086.07x = 190,494.50 × 87,075.51
4. Step 4: Simplify right side
   138,086.07x = 16,587,405,304.32
5. Step 5: Solve for x
   x = 16,587,405,304.32/138,086.07
6. Step 6: Final answer
   x = 120,123.67