Finding the Fourth Proportional to 105,154,143.48, 157,590,225 and 81,839,040.30

Step by Step Solution

1. Step 1: Write the proportion equation
   105,154,143.48 : 157,590,225 = 81,839,040.30 : x
2. Step 2: Convert to fraction form
   105,154,143.48/157,590,225 = 81,839,040.30/x
3. Step 3: Cross multiply
   105,154,143.48x = 157,590,225 × 81,839,040.30
4. Step 4: Simplify right side
   105,154,143.48x = 12,897,032,774,661,068
5. Step 5: Solve for x
   x = 12,897,032,774,661,068/105,154,143.48
6. Step 6: Final answer
   x = 122,648,831.02