Finding the Fourth Proportional to 113,979, 157,286.76 and 65,588.40

Step by Step Solution

1. Step 1: Write the proportion equation
   113,979 : 157,286.76 = 65,588.40 : x
2. Step 2: Convert to fraction form
   113,979/157,286.76 = 65,588.40/x
3. Step 3: Cross multiply
   113,979x = 157,286.76 × 65,588.40
4. Step 4: Simplify right side
   113,979x = 10,316,186,929.58
5. Step 5: Solve for x
   x = 10,316,186,929.58/113,979
6. Step 6: Final answer
   x = 90,509.54