Finding the Fourth Proportional to 56,758.38, 78,326.56 and 31,607.88

Step by Step Solution

1. Step 1: Write the proportion equation
   56,758.38 : 78,326.56 = 31,607.88 : x
2. Step 2: Convert to fraction form
   56,758.38/78,326.56 = 31,607.88/x
3. Step 3: Cross multiply
   56,758.38x = 78,326.56 × 31,607.88
4. Step 4: Simplify right side
   56,758.38x = 2,475,736,509.29
5. Step 5: Solve for x
   x = 2,475,736,509.29/56,758.38
6. Step 6: Final answer
   x = 43,618.87