Finding the Fourth Proportional to 283,186.72, 390,788.71 and 155,862.01

Step by Step Solution

1. Step 1: Write the proportion equation
   283,186.72 : 390,788.71 = 155,862.01 : x
2. Step 2: Convert to fraction form
   283,186.72/390,788.71 = 155,862.01/x
3. Step 3: Cross multiply
   283,186.72x = 390,788.71 × 155,862.01
4. Step 4: Simplify right side
   283,186.72x = 60,909,113,825.91
5. Step 5: Solve for x
   x = 60,909,113,825.91/283,186.72
6. Step 6: Final answer
   x = 215,084.64