Finding the Fourth Proportional to 100,570.35, 138,787.98 and 55,249.35

Step by Step Solution

1. Step 1: Write the proportion equation
   100,570.35 : 138,787.98 = 55,249.35 : x
2. Step 2: Convert to fraction form
   100,570.35/138,787.98 = 55,249.35/x
3. Step 3: Cross multiply
   100,570.35x = 138,787.98 × 55,249.35
4. Step 4: Simplify right side
   100,570.35x = 7,667,945,682.81
5. Step 5: Solve for x
   x = 7,667,945,682.81/100,570.35
6. Step 6: Final answer
   x = 76,244.60