Finding the Fourth Proportional to 111,467.16, 153,814.50 and 66,137.34

Step by Step Solution

1. Step 1: Write the proportion equation
   111,467.16 : 153,814.50 = 66,137.34 : x
2. Step 2: Convert to fraction form
   111,467.16/153,814.50 = 66,137.34/x
3. Step 3: Cross multiply
   111,467.16x = 153,814.50 × 66,137.34
4. Step 4: Simplify right side
   111,467.16x = 10,172,881,883.43
5. Step 5: Solve for x
   x = 10,172,881,883.43/111,467.16
6. Step 6: Final answer
   x = 91,263.49