Finding the Fourth Proportional to 165,503,111.55, 228,385,852.56 and 91,162,071.72

Step by Step Solution

1. Step 1: Write the proportion equation
   165,503,111.55 : 228,385,852.56 = 91,162,071.72 : x
2. Step 2: Convert to fraction form
   165,503,111.55/228,385,852.56 = 91,162,071.72/x
3. Step 3: Cross multiply
   165,503,111.55x = 228,385,852.56 × 91,162,071.72
4. Step 4: Simplify right side
   165,503,111.55x = 20,820,127,470,908,064
5. Step 5: Solve for x
   x = 20,820,127,470,908,064/165,503,111.55
6. Step 6: Final answer
   x = 125,799,009.31