Finding the Fourth Proportional to 91,606.51, 137,429.34 and 28,425.25

Step by Step Solution

1. Step 1: Write the proportion equation
   91,606.51 : 137,429.34 = 28,425.25 : x
2. Step 2: Convert to fraction form
   91,606.51/137,429.34 = 28,425.25/x
3. Step 3: Cross multiply
   91,606.51x = 137,429.34 × 28,425.25
4. Step 4: Simplify right side
   91,606.51x = 3,906,463,346.84
5. Step 5: Solve for x
   x = 3,906,463,346.84/91,606.51
6. Step 6: Final answer
   x = 42,643.95