Finding the Fourth Proportional to 72,978.68, 109,430.64 and 33,501.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,978.68 : 109,430.64 = 33,501.50 : x
2. Step 2: Convert to fraction form
   72,978.68/109,430.64 = 33,501.50/x
3. Step 3: Cross multiply
   72,978.68x = 109,430.64 × 33,501.50
4. Step 4: Simplify right side
   72,978.68x = 3,666,090,585.96
5. Step 5: Solve for x
   x = 3,666,090,585.96/72,978.68
6. Step 6: Final answer
   x = 50,235.09