Finding the Fourth Proportional to 205,803.15, 308,384.69 and 142,746.47

Step by Step Solution

1. Step 1: Write the proportion equation
   205,803.15 : 308,384.69 = 142,746.47 : x
2. Step 2: Convert to fraction form
   205,803.15/308,384.69 = 142,746.47/x
3. Step 3: Cross multiply
   205,803.15x = 308,384.69 × 142,746.47
4. Step 4: Simplify right side
   205,803.15x = 44,020,823,643.89
5. Step 5: Solve for x
   x = 44,020,823,643.89/205,803.15
6. Step 6: Final answer
   x = 213,897.72