Finding the Fourth Proportional to 99,420.84, 137,196.72 and 56,949.84

Step by Step Solution

1. Step 1: Write the proportion equation
   99,420.84 : 137,196.72 = 56,949.84 : x
2. Step 2: Convert to fraction form
   99,420.84/137,196.72 = 56,949.84/x
3. Step 3: Cross multiply
   99,420.84x = 137,196.72 × 56,949.84
4. Step 4: Simplify right side
   99,420.84x = 7,813,331,252.52
5. Step 5: Solve for x
   x = 7,813,331,252.52/99,420.84
6. Step 6: Final answer
   x = 78,588.47