Finding the Fourth Proportional to 42,478.32, 63,663 and 17,535.87

Step by Step Solution

1. Step 1: Write the proportion equation
   42,478.32 : 63,663 = 17,535.87 : x
2. Step 2: Convert to fraction form
   42,478.32/63,663 = 17,535.87/x
3. Step 3: Cross multiply
   42,478.32x = 63,663 × 17,535.87
4. Step 4: Simplify right side
   42,478.32x = 1,116,386,091.81
5. Step 5: Solve for x
   x = 1,116,386,091.81/42,478.32
6. Step 6: Final answer
   x = 26,281.31