Finding the Fourth Proportional to 89,142,483.45, 133,713,725.18 and 81,489,733.05

Step by Step Solution

1. Step 1: Write the proportion equation
   89,142,483.45 : 133,713,725.18 = 81,489,733.05 : x
2. Step 2: Convert to fraction form
   89,142,483.45/133,713,725.18 = 81,489,733.05/x
3. Step 3: Cross multiply
   89,142,483.45x = 133,713,725.18 × 81,489,733.05
4. Step 4: Simplify right side
   89,142,483.45x = 10,896,295,769,631,814
5. Step 5: Solve for x
   x = 10,896,295,769,631,814/89,142,483.45
6. Step 6: Final answer
   x = 122,234,599.58