Finding the Fourth Proportional to 114,429, 157,921.80 and 64,137.72

Step by Step Solution

1. Step 1: Write the proportion equation
   114,429 : 157,921.80 = 64,137.72 : x
2. Step 2: Convert to fraction form
   114,429/157,921.80 = 64,137.72/x
3. Step 3: Cross multiply
   114,429x = 157,921.80 × 64,137.72
4. Step 4: Simplify right side
   114,429x = 10,128,744,190.30
5. Step 5: Solve for x
   x = 10,128,744,190.30/114,429
6. Step 6: Final answer
   x = 88,515.54