Finding the Fourth Proportional to 105,154,081.74, 157,590,128.90 and 81,838,976.23

Step by Step Solution

1. Step 1: Write the proportion equation
   105,154,081.74 : 157,590,128.90 = 81,838,976.23 : x
2. Step 2: Convert to fraction form
   105,154,081.74/157,590,128.90 = 81,838,976.23/x
3. Step 3: Cross multiply
   105,154,081.74x = 157,590,128.90 × 81,838,976.23
4. Step 4: Simplify right side
   105,154,081.74x = 12,897,014,813,071,386
5. Step 5: Solve for x
   x = 12,897,014,813,071,386/105,154,081.74
6. Step 6: Final answer
   x = 122,648,732.22