Finding the Third Proportional to 153,572,557.50 and 217,300,468.50

Step by Step Solution

1. Step 1: Write the proportion equation
   153,572,557.50 : 217,300,468.50 = 217,300,468.50 : x
2. Step 2: Convert to fraction form
   153,572,557.50/217,300,468.50 = 217,300,468.50/x
3. Step 3: Cross multiply
   153,572,557.50x = 217,300,468.50 × 217,300,468.50
4. Step 4: Simplify right side
   153,572,557.50x = 47,219,493,610,319,496
5. Step 5: Solve for x
   x = 47,219,493,610,319,496/153,572,557.50
6. Step 6: Final answer
   x = 307,473,512.06