Finding the Fourth Proportional to 139,927,605.60, 193,162,022.69 and 90,392,137.55

Step by Step Solution

1. Step 1: Write the proportion equation
   139,927,605.60 : 193,162,022.69 = 90,392,137.55 : x
2. Step 2: Convert to fraction form
   139,927,605.60/193,162,022.69 = 90,392,137.55/x
3. Step 3: Cross multiply
   139,927,605.60x = 193,162,022.69 × 90,392,137.55
4. Step 4: Simplify right side
   139,927,605.60x = 17,460,328,123,012,930
5. Step 5: Solve for x
   x = 17,460,328,123,012,930/139,927,605.60
6. Step 6: Final answer
   x = 124,781,154.14