Finding the Fourth Proportional to 56,741.69, 78,264.42 and 51,685.67

Step by Step Solution

1. Step 1: Write the proportion equation
   56,741.69 : 78,264.42 = 51,685.67 : x
2. Step 2: Convert to fraction form
   56,741.69/78,264.42 = 51,685.67/x
3. Step 3: Cross multiply
   56,741.69x = 78,264.42 × 51,685.67
4. Step 4: Simplify right side
   56,741.69x = 4,045,148,984.86
5. Step 5: Solve for x
   x = 4,045,148,984.86/56,741.69
6. Step 6: Final answer
   x = 71,290.60