Finding the Fourth Proportional to 105,154,081.51, 157,590,128.50 and 81,838,976.03

Step by Step Solution

1. Step 1: Write the proportion equation
   105,154,081.51 : 157,590,128.50 = 81,838,976.03 : x
2. Step 2: Convert to fraction form
   105,154,081.51/157,590,128.50 = 81,838,976.03/x
3. Step 3: Cross multiply
   105,154,081.51x = 157,590,128.50 × 81,838,976.03
4. Step 4: Simplify right side
   105,154,081.51x = 12,897,014,748,876,120
5. Step 5: Solve for x
   x = 12,897,014,748,876,120/105,154,081.51
6. Step 6: Final answer
   x = 122,648,731.88