Finding the Fourth Proportional to 91,717.31, 137,595.71 and 28,536.10

Step by Step Solution

1. Step 1: Write the proportion equation
   91,717.31 : 137,595.71 = 28,536.10 : x
2. Step 2: Convert to fraction form
   91,717.31/137,595.71 = 28,536.10/x
3. Step 3: Cross multiply
   91,717.31x = 137,595.71 × 28,536.10
4. Step 4: Simplify right side
   91,717.31x = 3,926,444,667.48
5. Step 5: Solve for x
   x = 3,926,444,667.48/91,717.31
6. Step 6: Final answer
   x = 42,810.29