Finding the Fourth Proportional to 272,510,862.72, 408,615,059.52 and 90,658,769.28

Step by Step Solution

1. Step 1: Write the proportion equation
   272,510,862.72 : 408,615,059.52 = 90,658,769.28 : x
2. Step 2: Convert to fraction form
   272,510,862.72/408,615,059.52 = 90,658,769.28/x
3. Step 3: Cross multiply
   272,510,862.72x = 408,615,059.52 × 90,658,769.28
4. Step 4: Simplify right side
   272,510,862.72x = 37,044,538,405,357,144
5. Step 5: Solve for x
   x = 37,044,538,405,357,144/272,510,862.72
6. Step 6: Final answer
   x = 135,937,841.29