Finding the Fourth Proportional to 67,123.91, 100,619.35 and 31,521.50

Step by Step Solution

1. Step 1: Write the proportion equation
   67,123.91 : 100,619.35 = 31,521.50 : x
2. Step 2: Convert to fraction form
   67,123.91/100,619.35 = 31,521.50/x
3. Step 3: Cross multiply
   67,123.91x = 100,619.35 × 31,521.50
4. Step 4: Simplify right side
   67,123.91x = 3,171,672,259.12
5. Step 5: Solve for x
   x = 3,171,672,259.12/67,123.91
6. Step 6: Final answer
   x = 47,251.01