Finding the Fourth Proportional to 128,426.04, 177,184.71 and 74,667.15

Step by Step Solution

1. Step 1: Write the proportion equation
   128,426.04 : 177,184.71 = 74,667.15 : x
2. Step 2: Convert to fraction form
   128,426.04/177,184.71 = 74,667.15/x
3. Step 3: Cross multiply
   128,426.04x = 177,184.71 × 74,667.15
4. Step 4: Simplify right side
   128,426.04x = 13,229,877,319.28
5. Step 5: Solve for x
   x = 13,229,877,319.28/128,426.04
6. Step 6: Final answer
   x = 103,015.54