Finding the Fourth Proportional to 52,638.66, 72,688.59 and 48,964.50

Step by Step Solution

1. Step 1: Write the proportion equation
   52,638.66 : 72,688.59 = 48,964.50 : x
2. Step 2: Convert to fraction form
   52,638.66/72,688.59 = 48,964.50/x
3. Step 3: Cross multiply
   52,638.66x = 72,688.59 × 48,964.50
4. Step 4: Simplify right side
   52,638.66x = 3,559,160,465.06
5. Step 5: Solve for x
   x = 3,559,160,465.06/52,638.66
6. Step 6: Final answer
   x = 67,614.95