Finding the Fourth Proportional to 91,776.56, 137,638.40 and 25,218.84

Step by Step Solution

1. Step 1: Write the proportion equation
   91,776.56 : 137,638.40 = 25,218.84 : x
2. Step 2: Convert to fraction form
   91,776.56/137,638.40 = 25,218.84/x
3. Step 3: Cross multiply
   91,776.56x = 137,638.40 × 25,218.84
4. Step 4: Simplify right side
   91,776.56x = 3,471,080,787.46
5. Step 5: Solve for x
   x = 3,471,080,787.46/91,776.56
6. Step 6: Final answer
   x = 37,820.99