Finding the Fourth Proportional to 109,890.81, 151,601.36 and 64,488.69

Step by Step Solution

1. Step 1: Write the proportion equation
   109,890.81 : 151,601.36 = 64,488.69 : x
2. Step 2: Convert to fraction form
   109,890.81/151,601.36 = 64,488.69/x
3. Step 3: Cross multiply
   109,890.81x = 151,601.36 × 64,488.69
4. Step 4: Simplify right side
   109,890.81x = 9,776,572,786.17
5. Step 5: Solve for x
   x = 9,776,572,786.17/109,890.81
6. Step 6: Final answer
   x = 88,966.25