Finding the Fourth Proportional to 139,337.32, 209,077.98 and 69,215.08

Step by Step Solution

1. Step 1: Write the proportion equation
   139,337.32 : 209,077.98 = 69,215.08 : x
2. Step 2: Convert to fraction form
   139,337.32/209,077.98 = 69,215.08/x
3. Step 3: Cross multiply
   139,337.32x = 209,077.98 × 69,215.08
4. Step 4: Simplify right side
   139,337.32x = 14,471,349,111.94
5. Step 5: Solve for x
   x = 14,471,349,111.94/139,337.32
6. Step 6: Final answer
   x = 103,858.39