Finding the Fourth Proportional to 56,680.64, 78,186.72 and 35,423

Step by Step Solution

1. Step 1: Write the proportion equation
   56,680.64 : 78,186.72 = 35,423 : x
2. Step 2: Convert to fraction form
   56,680.64/78,186.72 = 35,423/x
3. Step 3: Cross multiply
   56,680.64x = 78,186.72 × 35,423
4. Step 4: Simplify right side
   56,680.64x = 2,769,608,182.56
5. Step 5: Solve for x
   x = 2,769,608,182.56/56,680.64
6. Step 6: Final answer
   x = 48,863.39