Finding the Fourth Proportional to 56,870.58, 85,302.78 and 17,427.81

Step by Step Solution

1. Step 1: Write the proportion equation
   56,870.58 : 85,302.78 = 17,427.81 : x
2. Step 2: Convert to fraction form
   56,870.58/85,302.78 = 17,427.81/x
3. Step 3: Cross multiply
   56,870.58x = 85,302.78 × 17,427.81
4. Step 4: Simplify right side
   56,870.58x = 1,486,640,642.31
5. Step 5: Solve for x
   x = 1,486,640,642.31/56,870.58
6. Step 6: Final answer
   x = 26,140.77