Finding the Fourth Proportional to 101,931.09, 140,666.79 and 56,613.27

Step by Step Solution

1. Step 1: Write the proportion equation
   101,931.09 : 140,666.79 = 56,613.27 : x
2. Step 2: Convert to fraction form
   101,931.09/140,666.79 = 56,613.27/x
3. Step 3: Cross multiply
   101,931.09x = 140,666.79 × 56,613.27
4. Step 4: Simplify right side
   101,931.09x = 7,963,606,962.30
5. Step 5: Solve for x
   x = 7,963,606,962.30/101,931.09
6. Step 6: Final answer
   x = 78,127.36