Finding the Fourth Proportional to 139,968,123.55, 209,952,185.33 and 103,688,417.95

Step by Step Solution

1. Step 1: Write the proportion equation
   139,968,123.55 : 209,952,185.33 = 103,688,417.95 : x
2. Step 2: Convert to fraction form
   139,968,123.55/209,952,185.33 = 103,688,417.95/x
3. Step 3: Cross multiply
   139,968,123.55x = 209,952,185.33 × 103,688,417.95
4. Step 4: Simplify right side
   139,968,123.55x = 21,769,609,942,012,900
5. Step 5: Solve for x
   x = 21,769,609,942,012,900/139,968,123.55
6. Step 6: Final answer
   x = 155,532,626.93