Finding the Fourth Proportional to 99,285.77, 137,013.32 and 73,905.63

Step by Step Solution

1. Step 1: Write the proportion equation
   99,285.77 : 137,013.32 = 73,905.63 : x
2. Step 2: Convert to fraction form
   99,285.77/137,013.32 = 73,905.63/x
3. Step 3: Cross multiply
   99,285.77x = 137,013.32 × 73,905.63
4. Step 4: Simplify right side
   99,285.77x = 10,126,055,363.46
5. Step 5: Solve for x
   x = 10,126,055,363.46/99,285.77
6. Step 6: Final answer
   x = 101,988.99