Finding the Fourth Proportional to 128,300.31, 177,047.25 and 70,936.29

Step by Step Solution

1. Step 1: Write the proportion equation
   128,300.31 : 177,047.25 = 70,936.29 : x
2. Step 2: Convert to fraction form
   128,300.31/177,047.25 = 70,936.29/x
3. Step 3: Cross multiply
   128,300.31x = 177,047.25 × 70,936.29
4. Step 4: Simplify right side
   128,300.31x = 12,559,075,069.70
5. Step 5: Solve for x
   x = 12,559,075,069.70/128,300.31
6. Step 6: Final answer
   x = 97,888.11