Finding the Fourth Proportional to 278,039.82, 417,084.33 and 78,361.98

Step by Step Solution

1. Step 1: Write the proportion equation
   278,039.82 : 417,084.33 = 78,361.98 : x
2. Step 2: Convert to fraction form
   278,039.82/417,084.33 = 78,361.98/x
3. Step 3: Cross multiply
   278,039.82x = 417,084.33 × 78,361.98
4. Step 4: Simplify right side
   278,039.82x = 32,683,553,925.77
5. Step 5: Solve for x
   x = 32,683,553,925.77/278,039.82
6. Step 6: Final answer
   x = 117,549.90