Finding the Fourth Proportional to 55,345.12, 76,378.56 and 31,476

Step by Step Solution

1. Step 1: Write the proportion equation
   55,345.12 : 76,378.56 = 31,476 : x
2. Step 2: Convert to fraction form
   55,345.12/76,378.56 = 31,476/x
3. Step 3: Cross multiply
   55,345.12x = 76,378.56 × 31,476
4. Step 4: Simplify right side
   55,345.12x = 2,404,091,554.56
5. Step 5: Solve for x
   x = 2,404,091,554.56/55,345.12
6. Step 6: Final answer
   x = 43,438.18