Finding the Fourth Proportional to 72,442, 99,970.23 and 42,248.17

Step by Step Solution

1. Step 1: Write the proportion equation
   72,442 : 99,970.23 = 42,248.17 : x
2. Step 2: Convert to fraction form
   72,442/99,970.23 = 42,248.17/x
3. Step 3: Cross multiply
   72,442x = 99,970.23 × 42,248.17
4. Step 4: Simplify right side
   72,442x = 4,223,559,271.98
5. Step 5: Solve for x
   x = 4,223,559,271.98/72,442
6. Step 6: Final answer
   x = 58,302.63