Finding the Fourth Proportional to 128,962.02, 177,967.59 and 72,373.38

Step by Step Solution

1. Step 1: Write the proportion equation
   128,962.02 : 177,967.59 = 72,373.38 : x
2. Step 2: Convert to fraction form
   128,962.02/177,967.59 = 72,373.38/x
3. Step 3: Cross multiply
   128,962.02x = 177,967.59 × 72,373.38
4. Step 4: Simplify right side
   128,962.02x = 12,880,116,018.75
5. Step 5: Solve for x
   x = 12,880,116,018.75/128,962.02
6. Step 6: Final answer
   x = 99,875.27