Finding the Fourth Proportional to 56,615.28, 78,141.96 and 35,109.78

Step by Step Solution

1. Step 1: Write the proportion equation
   56,615.28 : 78,141.96 = 35,109.78 : x
2. Step 2: Convert to fraction form
   56,615.28/78,141.96 = 35,109.78/x
3. Step 3: Cross multiply
   56,615.28x = 78,141.96 × 35,109.78
4. Step 4: Simplify right side
   56,615.28x = 2,743,547,024.37
5. Step 5: Solve for x
   x = 2,743,547,024.37/56,615.28
6. Step 6: Final answer
   x = 48,459.48