Finding the Fourth Proportional to 85,870.68, 128,821.86 and 26,702.52

Step by Step Solution

1. Step 1: Write the proportion equation
   85,870.68 : 128,821.86 = 26,702.52 : x
2. Step 2: Convert to fraction form
   85,870.68/128,821.86 = 26,702.52/x
3. Step 3: Cross multiply
   85,870.68x = 128,821.86 × 26,702.52
4. Step 4: Simplify right side
   85,870.68x = 3,439,868,293.09
5. Step 5: Solve for x
   x = 3,439,868,293.09/85,870.68
6. Step 6: Final answer
   x = 40,058.71