Finding the Fourth Proportional to 56,748.24, 78,312.72 and 31,254

Step by Step Solution

1. Step 1: Write the proportion equation
   56,748.24 : 78,312.72 = 31,254 : x
2. Step 2: Convert to fraction form
   56,748.24/78,312.72 = 31,254/x
3. Step 3: Cross multiply
   56,748.24x = 78,312.72 × 31,254
4. Step 4: Simplify right side
   56,748.24x = 2,447,585,750.88
5. Step 5: Solve for x
   x = 2,447,585,750.88/56,748.24
6. Step 6: Final answer
   x = 43,130.60