Finding the Fourth Proportional to 21,263.50, 31,909.83 and 7,412.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,263.50 : 31,909.83 = 7,412.50 : x
2. Step 2: Convert to fraction form
   21,263.50/31,909.83 = 7,412.50/x
3. Step 3: Cross multiply
   21,263.50x = 31,909.83 × 7,412.50
4. Step 4: Simplify right side
   21,263.50x = 236,531,614.88
5. Step 5: Solve for x
   x = 236,531,614.88/21,263.50
6. Step 6: Final answer
   x = 11,123.83