Finding the Fourth Proportional to 38,784.66, 53,519.67 and 21,787.98

Step by Step Solution

1. Step 1: Write the proportion equation
   38,784.66 : 53,519.67 = 21,787.98 : x
2. Step 2: Convert to fraction form
   38,784.66/53,519.67 = 21,787.98/x
3. Step 3: Cross multiply
   38,784.66x = 53,519.67 × 21,787.98
4. Step 4: Simplify right side
   38,784.66x = 1,166,085,499.57
5. Step 5: Solve for x
   x = 1,166,085,499.57/38,784.66
6. Step 6: Final answer
   x = 30,065.64