Finding the Fourth Proportional to 98,131.50, 135,421.47 and 53,419.50

Step by Step Solution

1. Step 1: Write the proportion equation
   98,131.50 : 135,421.47 = 53,419.50 : x
2. Step 2: Convert to fraction form
   98,131.50/135,421.47 = 53,419.50/x
3. Step 3: Cross multiply
   98,131.50x = 135,421.47 × 53,419.50
4. Step 4: Simplify right side
   98,131.50x = 7,234,147,216.67
5. Step 5: Solve for x
   x = 7,234,147,216.67/98,131.50
6. Step 6: Final answer
   x = 73,718.91