Finding the Fourth Proportional to 139,085,145.60, 208,765,025.28 and 104,420,981.76

Step by Step Solution

1. Step 1: Write the proportion equation
   139,085,145.60 : 208,765,025.28 = 104,420,981.76 : x
2. Step 2: Convert to fraction form
   139,085,145.60/208,765,025.28 = 104,420,981.76/x
3. Step 3: Cross multiply
   139,085,145.60x = 208,765,025.28 × 104,420,981.76
4. Step 4: Simplify right side
   139,085,145.60x = 21,799,448,896,888,820
5. Step 5: Solve for x
   x = 21,799,448,896,888,820/139,085,145.60
6. Step 6: Final answer
   x = 156,734,558.55