Finding the Fourth Proportional to 128,053.31, 176,716.41 and 70,692.50

Step by Step Solution

1. Step 1: Write the proportion equation
   128,053.31 : 176,716.41 = 70,692.50 : x
2. Step 2: Convert to fraction form
   128,053.31/176,716.41 = 70,692.50/x
3. Step 3: Cross multiply
   128,053.31x = 176,716.41 × 70,692.50
4. Step 4: Simplify right side
   128,053.31x = 12,492,525,255.72
5. Step 5: Solve for x
   x = 12,492,525,255.72/128,053.31
6. Step 6: Final answer
   x = 97,557.22