Finding the Fourth Proportional to 211,185.34, 316,751.59 and 69,018.72

Step by Step Solution

1. Step 1: Write the proportion equation
   211,185.34 : 316,751.59 = 69,018.72 : x
2. Step 2: Convert to fraction form
   211,185.34/316,751.59 = 69,018.72/x
3. Step 3: Cross multiply
   211,185.34x = 316,751.59 × 69,018.72
4. Step 4: Simplify right side
   211,185.34x = 21,861,789,174.78
5. Step 5: Solve for x
   x = 21,861,789,174.78/211,185.34
6. Step 6: Final answer
   x = 103,519.45