Finding the Fourth Proportional to 91,892.89, 137,858.47 and 28,710.46

Step by Step Solution

1. Step 1: Write the proportion equation
   91,892.89 : 137,858.47 = 28,710.46 : x
2. Step 2: Convert to fraction form
   91,892.89/137,858.47 = 28,710.46/x
3. Step 3: Cross multiply
   91,892.89x = 137,858.47 × 28,710.46
4. Step 4: Simplify right side
   91,892.89x = 3,957,980,189.14
5. Step 5: Solve for x
   x = 3,957,980,189.14/91,892.89
6. Step 6: Final answer
   x = 43,071.67