Finding the Fourth Proportional to 56,648.04, 78,172.74 and 31,154.46

Step by Step Solution

1. Step 1: Write the proportion equation
   56,648.04 : 78,172.74 = 31,154.46 : x
2. Step 2: Convert to fraction form
   56,648.04/78,172.74 = 31,154.46/x
3. Step 3: Cross multiply
   56,648.04x = 78,172.74 × 31,154.46
4. Step 4: Simplify right side
   56,648.04x = 2,435,429,501.42
5. Step 5: Solve for x
   x = 2,435,429,501.42/56,648.04
6. Step 6: Final answer
   x = 42,992.30