Finding the Fourth Proportional to 115,414.47, 159,276.78 and 64,430.03

Step by Step Solution

1. Step 1: Write the proportion equation
   115,414.47 : 159,276.78 = 64,430.03 : x
2. Step 2: Convert to fraction form
   115,414.47/159,276.78 = 64,430.03/x
3. Step 3: Cross multiply
   115,414.47x = 159,276.78 × 64,430.03
4. Step 4: Simplify right side
   115,414.47x = 10,262,208,111.90
5. Step 5: Solve for x
   x = 10,262,208,111.90/115,414.47
6. Step 6: Final answer
   x = 88,916.13