Finding the Fourth Proportional to 56,637.40, 78,180.82 and 42,531

Step by Step Solution

1. Step 1: Write the proportion equation
   56,637.40 : 78,180.82 = 42,531 : x
2. Step 2: Convert to fraction form
   56,637.40/78,180.82 = 42,531/x
3. Step 3: Cross multiply
   56,637.40x = 78,180.82 × 42,531
4. Step 4: Simplify right side
   56,637.40x = 3,325,108,455.42
5. Step 5: Solve for x
   x = 3,325,108,455.42/56,637.40
6. Step 6: Final answer
   x = 58,708.71