Finding the Fourth Proportional to 72,426, 99,953.64 and 42,623.76

Step by Step Solution

1. Step 1: Write the proportion equation
   72,426 : 99,953.64 = 42,623.76 : x
2. Step 2: Convert to fraction form
   72,426/99,953.64 = 42,623.76/x
3. Step 3: Cross multiply
   72,426x = 99,953.64 × 42,623.76
4. Step 4: Simplify right side
   72,426x = 4,260,399,962.49
5. Step 5: Solve for x
   x = 4,260,399,962.49/72,426
6. Step 6: Final answer
   x = 58,824.18