Finding the Fourth Proportional to 128,677.04, 177,573.72 and 72,088.88

Step by Step Solution

1. Step 1: Write the proportion equation
   128,677.04 : 177,573.72 = 72,088.88 : x
2. Step 2: Convert to fraction form
   128,677.04/177,573.72 = 72,088.88/x
3. Step 3: Cross multiply
   128,677.04x = 177,573.72 × 72,088.88
4. Step 4: Simplify right side
   128,677.04x = 12,801,090,592.23
5. Step 5: Solve for x
   x = 12,801,090,592.23/128,677.04
6. Step 6: Final answer
   x = 99,482.32