Finding the Fourth Proportional to 56,758.50, 78,328.53 and 31,266.72

Step by Step Solution

1. Step 1: Write the proportion equation
   56,758.50 : 78,328.53 = 31,266.72 : x
2. Step 2: Convert to fraction form
   56,758.50/78,328.53 = 31,266.72/x
3. Step 3: Cross multiply
   56,758.50x = 78,328.53 × 31,266.72
4. Step 4: Simplify right side
   56,758.50x = 2,449,076,215.52
5. Step 5: Solve for x
   x = 2,449,076,215.52/56,758.50
6. Step 6: Final answer
   x = 43,149.07