Finding the Fourth Proportional to 85,128.22, 127,692.06 and 85,005.10

Step by Step Solution

1. Step 1: Write the proportion equation
   85,128.22 : 127,692.06 = 85,005.10 : x
2. Step 2: Convert to fraction form
   85,128.22/127,692.06 = 85,005.10/x
3. Step 3: Cross multiply
   85,128.22x = 127,692.06 × 85,005.10
4. Step 4: Simplify right side
   85,128.22x = 10,854,476,329.51
5. Step 5: Solve for x
   x = 10,854,476,329.51/85,128.22
6. Step 6: Final answer
   x = 127,507.38