Finding the Fourth Proportional to 109,051.52, 150,499.01 and 66,618.05

Step by Step Solution

1. Step 1: Write the proportion equation
   109,051.52 : 150,499.01 = 66,618.05 : x
2. Step 2: Convert to fraction form
   109,051.52/150,499.01 = 66,618.05/x
3. Step 3: Cross multiply
   109,051.52x = 150,499.01 × 66,618.05
4. Step 4: Simplify right side
   109,051.52x = 10,025,949,987.18
5. Step 5: Solve for x
   x = 10,025,949,987.18/109,051.52
6. Step 6: Final answer
   x = 91,937.74