Finding the Fourth Proportional to 91,672.56, 126,513.98 and 51,386.34

Step by Step Solution

1. Step 1: Write the proportion equation
   91,672.56 : 126,513.98 = 51,386.34 : x
2. Step 2: Convert to fraction form
   91,672.56/126,513.98 = 51,386.34/x
3. Step 3: Cross multiply
   91,672.56x = 126,513.98 × 51,386.34
4. Step 4: Simplify right side
   91,672.56x = 6,501,090,134.10
5. Step 5: Solve for x
   x = 6,501,090,134.10/91,672.56
6. Step 6: Final answer
   x = 70,916.42