Finding the Fourth Proportional to 249,528.80, 374,400.42 and 81,100.76

Step by Step Solution

1. Step 1: Write the proportion equation
   249,528.80 : 374,400.42 = 81,100.76 : x
2. Step 2: Convert to fraction form
   249,528.80/374,400.42 = 81,100.76/x
3. Step 3: Cross multiply
   249,528.80x = 374,400.42 × 81,100.76
4. Step 4: Simplify right side
   249,528.80x = 30,364,158,606.32
5. Step 5: Solve for x
   x = 30,364,158,606.32/249,528.80
6. Step 6: Final answer
   x = 121,685.99