Finding the Fourth Proportional to 56,065.50, 77,370.53 and 30,915

Step by Step Solution

1. Step 1: Write the proportion equation
   56,065.50 : 77,370.53 = 30,915 : x
2. Step 2: Convert to fraction form
   56,065.50/77,370.53 = 30,915/x
3. Step 3: Cross multiply
   56,065.50x = 77,370.53 × 30,915
4. Step 4: Simplify right side
   56,065.50x = 2,391,909,780.38
5. Step 5: Solve for x
   x = 2,391,909,780.38/56,065.50
6. Step 6: Final answer
   x = 42,662.77