Finding the Fourth Proportional to 287,926.37, 431,889.52 and 98,388.37

Step by Step Solution

1. Step 1: Write the proportion equation
   287,926.37 : 431,889.52 = 98,388.37 : x
2. Step 2: Convert to fraction form
   287,926.37/431,889.52 = 98,388.37/x
3. Step 3: Cross multiply
   287,926.37x = 431,889.52 × 98,388.37
4. Step 4: Simplify right side
   287,926.37x = 42,492,906,186.77
5. Step 5: Solve for x
   x = 42,492,906,186.77/287,926.37
6. Step 6: Final answer
   x = 147,582.54