Finding the Fourth Proportional to 110,143, 152,010.30 and 65,431

Step by Step Solution

1. Step 1: Write the proportion equation
   110,143 : 152,010.30 = 65,431 : x
2. Step 2: Convert to fraction form
   110,143/152,010.30 = 65,431/x
3. Step 3: Cross multiply
   110,143x = 152,010.30 × 65,431
4. Step 4: Simplify right side
   110,143x = 9,946,185,939.30
5. Step 5: Solve for x
   x = 9,946,185,939.30/110,143
6. Step 6: Final answer
   x = 90,302.48