Finding the Fourth Proportional to 56,766.34, 78,341.13 and 31,615.78

Step by Step Solution

1. Step 1: Write the proportion equation
   56,766.34 : 78,341.13 = 31,615.78 : x
2. Step 2: Convert to fraction form
   56,766.34/78,341.13 = 31,615.78/x
3. Step 3: Cross multiply
   56,766.34x = 78,341.13 × 31,615.78
4. Step 4: Simplify right side
   56,766.34x = 2,476,815,931.03
5. Step 5: Solve for x
   x = 2,476,815,931.03/56,766.34
6. Step 6: Final answer
   x = 43,631.77