Finding the Fourth Proportional to 82,453,615.74, 123,680,353.28 and 21,042,769.55

Step by Step Solution

1. Step 1: Write the proportion equation
   82,453,615.74 : 123,680,353.28 = 21,042,769.55 : x
2. Step 2: Convert to fraction form
   82,453,615.74/123,680,353.28 = 21,042,769.55/x
3. Step 3: Cross multiply
   82,453,615.74x = 123,680,353.28 × 21,042,769.55
4. Step 4: Simplify right side
   82,453,615.74x = 2,602,577,171,210,011.50
5. Step 5: Solve for x
   x = 2,602,577,171,210,011.50/82,453,615.74
6. Step 6: Final answer
   x = 31,564,136.37