Finding the Fourth Proportional to 288,061.30, 397,444.89 and 186,090.81

Step by Step Solution

1. Step 1: Write the proportion equation
   288,061.30 : 397,444.89 = 186,090.81 : x
2. Step 2: Convert to fraction form
   288,061.30/397,444.89 = 186,090.81/x
3. Step 3: Cross multiply
   288,061.30x = 397,444.89 × 186,090.81
4. Step 4: Simplify right side
   288,061.30x = 73,960,841,510.46
5. Step 5: Solve for x
   x = 73,960,841,510.46/288,061.30
6. Step 6: Final answer
   x = 256,753.83