Finding the Fourth Proportional to 56,978.58, 85,498.47 and 23,721.60

Step by Step Solution

1. Step 1: Write the proportion equation
   56,978.58 : 85,498.47 = 23,721.60 : x
2. Step 2: Convert to fraction form
   56,978.58/85,498.47 = 23,721.60/x
3. Step 3: Cross multiply
   56,978.58x = 85,498.47 × 23,721.60
4. Step 4: Simplify right side
   56,978.58x = 2,028,160,505.95
5. Step 5: Solve for x
   x = 2,028,160,505.95/56,978.58
6. Step 6: Final answer
   x = 35,595.14