Finding the Fourth Proportional to 52,911.63, 78,852.15 and 51,309.72

Step by Step Solution

1. Step 1: Write the proportion equation
   52,911.63 : 78,852.15 = 51,309.72 : x
2. Step 2: Convert to fraction form
   52,911.63/78,852.15 = 51,309.72/x
3. Step 3: Cross multiply
   52,911.63x = 78,852.15 × 51,309.72
4. Step 4: Simplify right side
   52,911.63x = 4,045,881,737.90
5. Step 5: Solve for x
   x = 4,045,881,737.90/52,911.63
6. Step 6: Final answer
   x = 76,464.89