Finding the Fourth Proportional to 42,531.32, 63,794.82 and 12,948.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,531.32 : 63,794.82 = 12,948.50 : x
2. Step 2: Convert to fraction form
   42,531.32/63,794.82 = 12,948.50/x
3. Step 3: Cross multiply
   42,531.32x = 63,794.82 × 12,948.50
4. Step 4: Simplify right side
   42,531.32x = 826,047,226.77
5. Step 5: Solve for x
   x = 826,047,226.77/42,531.32
6. Step 6: Final answer
   x = 19,422.09