Finding the Fourth Proportional to 73,665.72, 110,499.66 and 21,075.30

Step by Step Solution

1. Step 1: Write the proportion equation
   73,665.72 : 110,499.66 = 21,075.30 : x
2. Step 2: Convert to fraction form
   73,665.72/110,499.66 = 21,075.30/x
3. Step 3: Cross multiply
   73,665.72x = 110,499.66 × 21,075.30
4. Step 4: Simplify right side
   73,665.72x = 2,328,813,484.40
5. Step 5: Solve for x
   x = 2,328,813,484.40/73,665.72
6. Step 6: Final answer
   x = 31,613.26