Finding the Fourth Proportional to 56,929.34, 78,388.58 and 51,589.42

Step by Step Solution

1. Step 1: Write the proportion equation
   56,929.34 : 78,388.58 = 51,589.42 : x
2. Step 2: Convert to fraction form
   56,929.34/78,388.58 = 51,589.42/x
3. Step 3: Cross multiply
   56,929.34x = 78,388.58 × 51,589.42
4. Step 4: Simplify right side
   56,929.34x = 4,044,021,376.82
5. Step 5: Solve for x
   x = 4,044,021,376.82/56,929.34
6. Step 6: Final answer
   x = 71,035.80