Finding the Fourth Proportional to 109,739.56, 151,445.78 and 64,419.52

Step by Step Solution

1. Step 1: Write the proportion equation
   109,739.56 : 151,445.78 = 64,419.52 : x
2. Step 2: Convert to fraction form
   109,739.56/151,445.78 = 64,419.52/x
3. Step 3: Cross multiply
   109,739.56x = 151,445.78 × 64,419.52
4. Step 4: Simplify right side
   109,739.56x = 9,756,064,453.63
5. Step 5: Solve for x
   x = 9,756,064,453.63/109,739.56
6. Step 6: Final answer
   x = 88,901.98