Finding the Fourth Proportional to 73,978.50, 102,090.69 and 40,444.50

Step by Step Solution

1. Step 1: Write the proportion equation
   73,978.50 : 102,090.69 = 40,444.50 : x
2. Step 2: Convert to fraction form
   73,978.50/102,090.69 = 40,444.50/x
3. Step 3: Cross multiply
   73,978.50x = 102,090.69 × 40,444.50
4. Step 4: Simplify right side
   73,978.50x = 4,129,006,911.71
5. Step 5: Solve for x
   x = 4,129,006,911.71/73,978.50
6. Step 6: Final answer
   x = 55,813.61