Finding the Fourth Proportional to 128,042.48, 176,710.38 and 70,692.05

Step by Step Solution

1. Step 1: Write the proportion equation
   128,042.48 : 176,710.38 = 70,692.05 : x
2. Step 2: Convert to fraction form
   128,042.48/176,710.38 = 70,692.05/x
3. Step 3: Cross multiply
   128,042.48x = 176,710.38 × 70,692.05
4. Step 4: Simplify right side
   128,042.48x = 12,492,019,018.48
5. Step 5: Solve for x
   x = 12,492,019,018.48/128,042.48
6. Step 6: Final answer
   x = 97,561.52