Finding the Fourth Proportional to 111,460.79, 153,815.90 and 63,715.21

Step by Step Solution

1. Step 1: Write the proportion equation
   111,460.79 : 153,815.90 = 63,715.21 : x
2. Step 2: Convert to fraction form
   111,460.79/153,815.90 = 63,715.21/x
3. Step 3: Cross multiply
   111,460.79x = 153,815.90 × 63,715.21
4. Step 4: Simplify right side
   111,460.79x = 9,800,411,666.72
5. Step 5: Solve for x
   x = 9,800,411,666.72/111,460.79
6. Step 6: Final answer
   x = 87,926.99