Finding the Fourth Proportional to 42,060.80, 63,081.47 and 12,471.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,060.80 : 63,081.47 = 12,471.50 : x
2. Step 2: Convert to fraction form
   42,060.80/63,081.47 = 12,471.50/x
3. Step 3: Cross multiply
   42,060.80x = 63,081.47 × 12,471.50
4. Step 4: Simplify right side
   42,060.80x = 786,720,175.34
5. Step 5: Solve for x
   x = 786,720,175.34/42,060.80
6. Step 6: Final answer
   x = 18,704.36