Finding the Fourth Proportional to 128,337.58, 177,100.76 and 70,973.18

Step by Step Solution

1. Step 1: Write the proportion equation
   128,337.58 : 177,100.76 = 70,973.18 : x
2. Step 2: Convert to fraction form
   128,337.58/177,100.76 = 70,973.18/x
3. Step 3: Cross multiply
   128,337.58x = 177,100.76 × 70,973.18
4. Step 4: Simplify right side
   128,337.58x = 12,569,404,117.62
5. Step 5: Solve for x
   x = 12,569,404,117.62/128,337.58
6. Step 6: Final answer
   x = 97,940.17