Finding the Fourth Proportional to 92,272, 138,417.72 and 42,343.60

Step by Step Solution

1. Step 1: Write the proportion equation
   92,272 : 138,417.72 = 42,343.60 : x
2. Step 2: Convert to fraction form
   92,272/138,417.72 = 42,343.60/x
3. Step 3: Cross multiply
   92,272x = 138,417.72 × 42,343.60
4. Step 4: Simplify right side
   92,272x = 5,861,104,568.59
5. Step 5: Solve for x
   x = 5,861,104,568.59/92,272
6. Step 6: Final answer
   x = 63,519.86