Finding the Fourth Proportional to 72,369.27, 99,870.63 and 42,153.81

Step by Step Solution

1. Step 1: Write the proportion equation
   72,369.27 : 99,870.63 = 42,153.81 : x
2. Step 2: Convert to fraction form
   72,369.27/99,870.63 = 42,153.81/x
3. Step 3: Cross multiply
   72,369.27x = 99,870.63 × 42,153.81
4. Step 4: Simplify right side
   72,369.27x = 4,209,927,561.60
5. Step 5: Solve for x
   x = 4,209,927,561.60/72,369.27
6. Step 6: Final answer
   x = 58,172.86