Finding the Fourth Proportional to 56,895.39, 85,276.56 and 42,810.20

Step by Step Solution

1. Step 1: Write the proportion equation
   56,895.39 : 85,276.56 = 42,810.20 : x
2. Step 2: Convert to fraction form
   56,895.39/85,276.56 = 42,810.20/x
3. Step 3: Cross multiply
   56,895.39x = 85,276.56 × 42,810.20
4. Step 4: Simplify right side
   56,895.39x = 3,650,706,588.91
5. Step 5: Solve for x
   x = 3,650,706,588.91/56,895.39
6. Step 6: Final answer
   x = 64,165.24