Finding the Fourth Proportional to 107,090.52, 147,788.73 and 64,640.76

Step by Step Solution

1. Step 1: Write the proportion equation
   107,090.52 : 147,788.73 = 64,640.76 : x
2. Step 2: Convert to fraction form
   107,090.52/147,788.73 = 64,640.76/x
3. Step 3: Cross multiply
   107,090.52x = 147,788.73 × 64,640.76
4. Step 4: Simplify right side
   107,090.52x = 9,553,175,826.63
5. Step 5: Solve for x
   x = 9,553,175,826.63/107,090.52
6. Step 6: Final answer
   x = 89,206.55