Finding the Fourth Proportional to 78,856.86, 108,941.18 and 51,697.47

Step by Step Solution

1. Step 1: Write the proportion equation
   78,856.86 : 108,941.18 = 51,697.47 : x
2. Step 2: Convert to fraction form
   78,856.86/108,941.18 = 51,697.47/x
3. Step 3: Cross multiply
   78,856.86x = 108,941.18 × 51,697.47
4. Step 4: Simplify right side
   78,856.86x = 5,631,983,126.33
5. Step 5: Solve for x
   x = 5,631,983,126.33/78,856.86
6. Step 6: Final answer
   x = 71,420.33