Finding the Fourth Proportional to 45,820.86, 68,728.72 and 12,538.48

Step by Step Solution

1. Step 1: Write the proportion equation
   45,820.86 : 68,728.72 = 12,538.48 : x
2. Step 2: Convert to fraction form
   45,820.86/68,728.72 = 12,538.48/x
3. Step 3: Cross multiply
   45,820.86x = 68,728.72 × 12,538.48
4. Step 4: Simplify right side
   45,820.86x = 861,753,274.81
5. Step 5: Solve for x
   x = 861,753,274.81/45,820.86
6. Step 6: Final answer
   x = 18,807.01