Finding the Fourth Proportional to 172,488,665.58, 258,320,528.00 and 99,484,116.72

Step by Step Solution

1. Step 1: Write the proportion equation
   172,488,665.58 : 258,320,528.00 = 99,484,116.72 : x
2. Step 2: Convert to fraction form
   172,488,665.58/258,320,528.00 = 99,484,116.72/x
3. Step 3: Cross multiply
   172,488,665.58x = 258,320,528.00 × 99,484,116.72
4. Step 4: Simplify right side
   172,488,665.58x = 25,698,789,558,226,608
5. Step 5: Solve for x
   x = 25,698,789,558,226,608/172,488,665.58
6. Step 6: Final answer
   x = 148,988,279.73