Finding the Fourth Proportional to 156,959.30, 235,093.35 and 139,448.90

Step by Step Solution

1. Step 1: Write the proportion equation
   156,959.30 : 235,093.35 = 139,448.90 : x
2. Step 2: Convert to fraction form
   156,959.30/235,093.35 = 139,448.90/x
3. Step 3: Cross multiply
   156,959.30x = 235,093.35 × 139,448.90
4. Step 4: Simplify right side
   156,959.30x = 32,783,509,054.82
5. Step 5: Solve for x
   x = 32,783,509,054.82/156,959.30
6. Step 6: Final answer
   x = 208,866.31