Finding the Fourth Proportional to 61,002.69, 91,486.44 and 21,020.05

Step by Step Solution

1. Step 1: Write the proportion equation
   61,002.69 : 91,486.44 = 21,020.05 : x
2. Step 2: Convert to fraction form
   61,002.69/91,486.44 = 21,020.05/x
3. Step 3: Cross multiply
   61,002.69x = 91,486.44 × 21,020.05
4. Step 4: Simplify right side
   61,002.69x = 1,923,048,980.59
5. Step 5: Solve for x
   x = 1,923,048,980.59/61,002.69
6. Step 6: Final answer
   x = 31,524.00