Finding the Fourth Proportional to 60,636.72, 90,787.14 and 30,990.72

Step by Step Solution

1. Step 1: Write the proportion equation
   60,636.72 : 90,787.14 = 30,990.72 : x
2. Step 2: Convert to fraction form
   60,636.72/90,787.14 = 30,990.72/x
3. Step 3: Cross multiply
   60,636.72x = 90,787.14 × 30,990.72
4. Step 4: Simplify right side
   60,636.72x = 2,813,558,835.34
5. Step 5: Solve for x
   x = 2,813,558,835.34/60,636.72
6. Step 6: Final answer
   x = 46,400.25