Finding the Fourth Proportional to 159,498.56, 220,113 and 91,528

Step by Step Solution

1. Step 1: Write the proportion equation
   159,498.56 : 220,113 = 91,528 : x
2. Step 2: Convert to fraction form
   159,498.56/220,113 = 91,528/x
3. Step 3: Cross multiply
   159,498.56x = 220,113 × 91,528
4. Step 4: Simplify right side
   159,498.56x = 20,146,502,664
5. Step 5: Solve for x
   x = 20,146,502,664/159,498.56
6. Step 6: Final answer
   x = 126,311.50